Lightweight and durable backpacks from a simple and rational building.
Concept: minimal accessories well placed for maximum efficiency!
Main application: Ultralight hiking, ultralight trekking....
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| 200D Nylon Diamond spectra ripstop finish, Bottom, side pockets, waist and shoulder strap are made of black cordura 330D by default. |
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| Only load lifter cord option on this (Cloud grey) KS50 pack, default front pocket have now this design. "Frame set" is optional |
KS packs series Fit:
Innovative fabrics, the weight / resistance ratio optimized for safe and sustainable using.
A large main tube simple and convenient to use.
A large front pocket 8L (June 2020), made in duty nylon mesh by default (160 gr/m²) UV resistant, or fabric for color and opacity in option (Fit mesh bottom part to drain water), to store shelter, clothing or other items even wet.
Shoulder straps (12 mm X 65 mm width): NEW (November 2021) high resilience 10 mm foam(＊) covered inside by 2mm of 3D mesh, light, strong and very comfortable. 20 mm daisy chain included on shoulder strap up to load lifter start location for every packs by default.
(＊= for KS4,40,50,60, Alpisack, R-35-50, Tao pack, KS35Z)
A wide padded belt (KS 40/50) with 10 mm foam covered inner side by 2mm 3D mesh, very comfortable and provide good load report on hip (with 25 mm webbing by default).
The padded part size is the same for every packs, the webbing strap length is adjusted according to customer waist size.
2 side pockets compact and easily accessible even the pack worn, (if you want them taller by custom please note it means you must remove the pack to take the bottle) closer to the hips and lower back, ensuring comfort and balance. (drainage holes at corner bottom)
Side pockets enlarged since January 2018A system of lateral shock cords, simple, light but very efficient (two 3 mm cord x 80 cm = +8 gr) / by line locks , 11 loops in total including for the front pocket to allow shock cord lashing.
Top closure by simple and convenient by draw cord and 13 mm webbing strap (about 60 cm), which is fixed between the start of the shoulder straps up to the front pocket, making a load lifters effect .
13 mm webbing Sternum strap height adjustable on daisy chain and removable ( +9 gr) .
13 mm webbing Sternum strap height adjustable on daisy chain and removable ( +9 gr) .
Every pack come with 1,8 meters of 2mm elastic shock cord and 1 cord lock to secure your sit pad on back (not possible with anatomic padded hip belt) or secure your pole using loops etc...
6 bottom additional loops in option.
2 removable waist pockets for all models in option.
Available in:
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For bottom, Shoulder strap, padded waist belt and side pockets, 330D cordura black fabric is used by default, change are possible by Option here.
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| 2 liters bottle in KS 50 pocket in PIC. Side pockets compact and easily accessible even the pack worn. Bottle size you can put inside one side pocket: 1 L / KS30, 1,5L / KS 40, 2L for KS 50 or 2 X 1 liter ( "smart bottle " 7,5 cm diameter) All pockets enlarged since January 2018 Fit side shock cord to maintain taller items, up to 3L water pouch for Ex. |
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| Drawstring top closure by default: Draw cord/ cord lock (in PIC) covered by 13 mm compression strap. |
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| Reinforcement patch color available in KS Packs menu only for default front mesh pocket |
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| Default 13 mm strap and hook clipped on D ring, keep secured even without tension on strap (Twice stronger than 13 mm buckle for same weight. Buckle it is still available in 20 mm size option) |
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| NEW 8L default front pocket with 5 front loops for bungee cord included (June 2020). |
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Fabric front pocket option finish:
with strong mesh at the bottom to drain water.
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Included loops allow to use your pad on back
(Not compatible with anatomic belt, 3D mesh back option, no top and bottom loops in this case)
5 torso sizes: 44 cm, 47 cm, 50 cm, 53 cm, 56 cm
1) Measure your back (torso size) like this X (up to C7, not trapezius) and add 3 CM
2) And measure your usual backpack to be sure, bottom of the pack up to start of shoulder strap Y (If start part is inclined, take at middle point of one strap)
3) By default (Subject to differ according to your legs length): for 1m62 ---> 44 cm 1 m 68---> 47 cm, 1m74--> 50 cm, 1m80-->53cm, 1m86-->56 cm ( Asiatic people may add 3 cm for this method)
Intersect the result of 3 methods to be sure. |
| Measure Belt hip size at larger part of ilium |
Load lifter option is recommended for adjust your backpack torso length. (increases the length effect)
The weight of backpack are estimated with a a medium belt (for 90 cm usual pants belt) without accessory (sternum strap, bungee etc..) and without options.
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| Approximative size, the pack rounded by its content, (not bottom or side size) KS 50 or 60 total length (collar full opened) is 80 cm, 75 cm for KS 40, 70 cm for KS30 |
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KS 30
Volume total : 28L ( 18 L body +8 L front pocket +1+1L side pocket),
Estimate weight (without accessories, sternum strap, bungee cord..): 350 gr X-Pac X21RC or 200D Nylon/spectra.
For recommend base gear list up to 4 kg, comfort limit up to 9 kg, limit total loads up to 12 kg .
Maximum pack collar length = 70 cm, if you wear 53 cm or 56 cm torso size, consider the 10 cm extension collar option below.
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KS 40
Volume total : 38L ( 27 L body +8 L front pocket +1,5+1,5L side pocket), (Bear canister compatible only at outside top, BV500 can enter inside but the pack turn full rounded)
Estimate weight (without accessories): 380 gr X-Pac X21RC or 200D Nylon/spectra.
For recommend base gear list up to 4 kg, comfort limit up to 9 kg, limit total loads up to 12 kg . (SUL version of KS 30 and 40 here)
For recommend base gear list up to 4 kg, comfort limit up to 9 kg, limit total loads up to 12 kg . (SUL version of KS 30 and 40 here)
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KS 50 (Compatible BV500 inserted vertically inside, best location between shoulders according to my test)
Volume total 48 L (36+8+2+2),
For recommend base gear list up to 4 kg, comfort limit up to 9 kg, limit total loads up to 12 kg . Estimated weight (without accessories) : 400 gr x-pac X21RC or 200D Nylon/spectra.
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New KS 60, Roomy size to insert inside vertically bear canister with more comfort than KS50 or for bulky winter gears.
Volume total 58 L (45+8+2,5+2,5),
For recommend base gear list up to 4 kg, comfort limit up to 9 kg, limit total loads up to 12 kg.
Estimated weight (without accessories) : 420 gr x-pac X21RC or 200D Nylon/spectra.
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Estimated weight (without accessories) : 420 gr x-pac X21RC or 200D Nylon/spectra.
Measure Belt hip size at larger part of ilium
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VX07 Black, Red are soft version, discontinued VX07 soft Silver grey left enough for one pack, please email if needed.
KS Packs order:
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Front pocket fabric options if not default nylon mesh Cordura add 10 gr, VX07 soft, 200D nylon save 5 gr, other X-pac add 10 gr, LS07 not recommended.
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Nylon/Spectra fabric + 20 mm top strap/buckle option in PIC.
By default fit strong mesh at the bottom of pocket to drain water when fabric finish.
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ADDITIONAL OPTIONS:
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Ice Axes or trekking pole loops holder :
Fit 2 up to 6 loop/cord lock at up and low part , add 5 gr for 2 loops.(Options are cumulative, for ex: Option for pole both sides + for ice axes at one or two sides)
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| Trekking pole loops holder (left side). 35 cm between loops. |
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| Ice axe loop holder (right side) |
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Removable pocket 1L:
Weight around: 24 gr LS07, 28 gr X21RC or Spectra, 30gr VX07, 35 gr VX21
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(This pocket is compatible with internal pad pocket option but not with internal pocket option.) Add 3 gr or 20 gr
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| Placed at center, allow right or left pipe way out. |
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| Water pouch + hook |
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Back in mesh 3D add 60gr approx.
Padded with not removable 8mm foam pad add 85 gr in total.
Padded with not removable 8mm foam pad add 85 gr in total.
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| Back in 3D mesh (2 mm) |
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| Back in 3D mesh padded with not removable 8mm foam. (total=10 mm) |
Internal pocket fixed or removable:
(around 20cm x 21cm) made of nylon ripstop 70 D black, mini velcro, FIXED: 9 gr
REMOVABLE for UL satchel use fit hook and round cord: 17 gr
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| FIX |
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| REMOVABLE for satchel use |
Large belt option 38 mm with dual Adjust Side Release Buckle (in place of 25 mm default) for confort and better load report on waist.
Add 9 gr in 85-94 cm belt size range:
20 mm removable air sternum strap with whistle, (height adjustable by sliding on strap) weight 18 gr but add only 9gr from standard default 13 mm sternum strap.
Usable length 40 cm VS 30 cm for default 13mm model.
Comfortable and convenient even in cold condition.
Dry bag type top closure system:
Or by snaps (New)
Top 15 mm buckle:
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| By Snaps |
The backpack don't turn waterproof with this option.
(Associate with extension collar option is recommended mostly if you have 56 cm torso size, to increase rolled part longer)
Sit Pad pockets pair:
200D nylon/ spectra for add 16gr cordura 330D 18 gr 3D mesh add 24 gr
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| Made of 3D mesh add 24 gr |
Sit pad are sold below
Sit pad size around 25 x 50cm (rectangular since March 2018) according to your back length size, in durable ( Made in Japan) PE foam, 10 mm, color grey.
Price 1000 JPY
Zipped front pocket option 7L + 10 gr:
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| Re-designed: December 2021 |
Internal pad holder corners set:
Usable Width = 25 cm, length = your torso size less 6 cm:
Using with removable pad, make the back of the pack more comfortable and more rigid.
Weight + 6 gr
Weight + 6 gr
10 mm Pad in option, shaped and weight according to your back size + 40 gr.
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Load lifter strap :
For frame less pack the load lifter system work well only when the pack is full.
Load lifter option is recommended also for adjust your backpack torso length. (Increases the length effect)
Should be made from lineloc and rigid cord for UL pack .
Cord add 9 gr , 20 mm add 17gr. The 2 solutions works well, the cord may be changed when degraded, 20 mm strap may have easier handling .
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20 mm webbing
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| Linelock + cord |
Anatomic padded hip belt with side load lifter strap :
For better load transfer on the hips, mostly slim people (Only waist 70 cm up to 84 cm) included 38mm webbing and buckle option, add around 40 gr.
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| Anatomic padded belt |
No top and bottom loops in this case for lashing pad.
Not compatible with the Sit Pad pockets option but compatible with the Internal pad corner option Fabric : Black 330D by default.
Also compatible with the frame set option and side removable waist pockets.
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Upper side pockets pair
They are quite flat to not interfere with the pockets below, you can also use the side cord to prevent content from sliding down:
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| Strong mesh |
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| Fabric with 500 ml bottle (Fit hole at low corner to drain water) |
Removable Frame set :
Easily removable (10 sec) frame aluminium tube, weight according to your torso size around 50 gr (25 gr + 25 gr for stays) + 10 gr for fixed loops. Associate with 38 mm waist strap/buckle option is recommended.
New: you can order the system without tube and use yours: Carbon pole, DIY etc...tube length =your torso size + about 20 mm diameter 8 or 9 mm. I suggest putting duct tape on the end of the tube to prevent abrasion and increasing the diameter to secure the whole thing without a gap.
Associate with load lifter strap or cord option is also recommended.
This option is compatible with backpack: KS packs, Alpisack, R-50, and all options even anatomic padded hip belt option.
Effective load report on hip showed in "Frame set video"
Because of pandemic, the price differ according to country destination (Shipping fee)
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Custom front pocket form with fabric stripe at top and separate top closure with triangle reinforcement patch (Top strap is not fixed directly on pocket like standard fitting but dissociate)
Available for standard mesh pocket and fabric pocket.
Stripe material: 200D N/Spectra or X-pac fabric
Recommend to use with your sit pad in back, extern or intern, to keep distance from of the tube.
Because of pandemic, the price differ according to country destination (shipping fee)
Because of pandemic, the price differ according to country destination (Shipping fee)
Custom front pocket form with fabric stripe at top and separate top closure with triangle reinforcement patch (Top strap is not fixed directly on pocket like standard fitting but dissociate)
Available for standard mesh pocket and fabric pocket.
Stripe material: 200D N/Spectra or X-pac fabric
(No significant weight gain)
Price: 1000 JPY
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Bottom loops options:
Option 1 = 4 loops at bottom
Option 2 = 4 gear loops at front of bottom add 2 gr
Option 3 = option 1 + option 2 = 6 loops in total (2 jointly) add 3 gr
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Strap size option:
20 mm width in place of standard 13 mm for shoulder strap webbing (more comfort) and top closure webbing (Buckle in place of hook)
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Removable or fix "hand pull loops" :
Hand pull loops are made to insert the thumb to pull and relieve shoulder part.
Size 20 mm. (The 20 mm daisy chain are now included by default)
Add around Fix 10 gr/pair (Removable mean you can put off the loop when no needed) Removable 15gr.
Not compatible with Lycra mesh pocket option
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Y shaped top closure strap:
Useful if you planned to carry big item like bear canister (some people use the default strap), in other cases, standard close by 13 mm or 20 mm strap is enough efficient even for a rolled pad.
13 mm + hook add around 10 gr (Top maximum length = 2X70 cm+ front hook attach)
20 mm + buckle add around 20 gr (Top maximum length = 2X70 cm + front 20 cm strap/buckle)
(Associate with the front pocket custom form option is recommended to dissociate pocket and strap and prevent slipping items .
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Lycra mesh shoulder pocket on shoulder strap:
For smartphone, compact camera, sun glasses or snack, not for water bottle. (Not compatible with hand pull loops option):
Add 30 gr /pair (Not removable)
Now heavy mesh for high durability (May 2019)
Right pocket opened, left pocket Zipped by default or select on PayPal menu:
Lycra mesh shoulder pouch
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Extension collar option + 10 cm
By default, KS 50 total length (collar full opened like in PIC) is 80 cm, 75 cm for KS 40, 70 cm for KS30 .
To increase collar length for better efficient close (mostly if you have 56 cm torso size for KS30 or 40) or increase volume (bear canister inside for ex) you can add this option:
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| 200D N/spectra top stripe |
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| Red X-pac top stripe |
Price: 1000 JPY
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Bottom loops options:
Option 1 = 4 loops at bottom
Option 2 = 4 gear loops at front of bottom add 2 gr
Option 3 = option 1 + option 2 = 6 loops in total (2 jointly) add 3 gr
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| 4 loops at bottom |
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| 4 loops at front bottom (Black color, green only for illustration) |
Strap size option:
20 mm width in place of standard 13 mm for shoulder strap webbing (more comfort) and top closure webbing (Buckle in place of hook)
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| 20 mm top closure strap webbing option add 7gr |
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| 20 mm shoulder strap webbing option add 12 gr |
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Removable or fix "hand pull loops" :
Hand pull loops are made to insert the thumb to pull and relieve shoulder part.
Size 20 mm. (The 20 mm daisy chain are now included by default)
Add around Fix 10 gr/pair (Removable mean you can put off the loop when no needed) Removable 15gr.
Not compatible with Lycra mesh pocket option
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| Removable hand pull. |
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Useful if you planned to carry big item like bear canister (some people use the default strap), in other cases, standard close by 13 mm or 20 mm strap is enough efficient even for a rolled pad.
13 mm + hook add around 10 gr (Top maximum length = 2X70 cm+ front hook attach)
20 mm + buckle add around 20 gr (Top maximum length = 2X70 cm + front 20 cm strap/buckle)
(Associate with the front pocket custom form option is recommended to dissociate pocket and strap and prevent slipping items .
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| 20 mm strap |
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Lycra mesh shoulder pocket on shoulder strap:
For smartphone, compact camera, sun glasses or snack, not for water bottle. (Not compatible with hand pull loops option):
Add 30 gr /pair (Not removable)
Now heavy mesh for high durability (May 2019)
Right pocket opened, left pocket Zipped by default or select on PayPal menu:
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Extension collar option + 10 cm
By default, KS 50 total length (collar full opened like in PIC) is 80 cm, 75 cm for KS 40, 70 cm for KS30 .
To increase collar length for better efficient close (mostly if you have 56 cm torso size for KS30 or 40) or increase volume (bear canister inside for ex) you can add this option:
At the opposite, with a torso 44 cm for a KS40, it is better to skip for a KS50 or KS60 if you want to increase volume than to add a collar extension option.
Weight for a KS 50 = around +14 gr /X21RC fabric, 10 gr /LS07, volume 5L
Price 1000 JPY
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Quick trekking pole holder
Usable the pack worn, Add 6 to 12 gr
(Only one side can support 2 poles but consider 2 sides for weight repartition and balance)
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"KABUTO " top closure option:
"Kabuto top closure"= dry bag type top closure combined with load lifter strap attach on shoulder strap (see picture), possibility to close like a simple dry bag, 20 mm strap and buckle
(Fit New velcro (Dec 2018) with soft touch, not agressive for skin and witch almost no stitch on other fabrics)Weight 22 gr The backpack don't turn waterproof with this option.
Price 2000 JPY
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Bottom heavy lycra mesh pocket:
Available for right hand or left hand access.(Small trash hole at the opposite side corner)
Weight 14 gr , 16, 18 or 22 gr according to bottom size.
--------------------------------------------------------------------------------------------------------------Weight for a KS 50 = around +14 gr /X21RC fabric, 10 gr /LS07, volume 5L
Price 1000 JPY
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Quick trekking pole holder
Usable the pack worn, Add 6 to 12 gr
(Only one side can support 2 poles but consider 2 sides for weight repartition and balance)
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| Left side in this PIC |
"KABUTO " top closure option:
"Kabuto top closure"= dry bag type top closure combined with load lifter strap attach on shoulder strap (see picture), possibility to close like a simple dry bag, 20 mm strap and buckle
(Fit New velcro (Dec 2018) with soft touch, not agressive for skin and witch almost no stitch on other fabrics)Weight 22 gr The backpack don't turn waterproof with this option.
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Bottom heavy lycra mesh pocket:
Available for right hand or left hand access.(Small trash hole at the opposite side corner)
Weight 14 gr , 16, 18 or 22 gr according to bottom size.
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| Right hand open side |
Rounded pouch (Removable):
Multi usage: for bottle, soft flask or GPS, camera, snack, smartphone etc...
Volume 0, 6 L( 7cm diameter/ 17 cm)
Top and bottom fixation by two 25 mm clips, strong mesh at bottom.
Weight from 18gr (LS07)/ 200D and Soft VX07: 20 gr
0,5 L Bottle and 0,6L soft flask in sale here
Removable belt strap (20, 25 or 38mm width size)
in place of fixed padded belt. (Not compatible with frame set option)
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| 25 mm in picture |