KS packs

Lightweight and durable backpacks from a simple and rational building.

Concept: minimal accessories well placed for maximum efficiency!

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 ( 4x30x40 cm =5L) , made in mesh by default (106 gr m²) or fabric option +16 gr or strong mesh option +20 gr (175gr/m²) for high durability, to store shelter, clothing or other items even wet. (strong mesh or fabric finish pocket recommended for N/dyneema or VX 07 packs)
  For fabric front pocket option: fit strong mesh at bottom to drain the water, see picture below.

 A wide padded belt (KS 40/ 50/30) with 8 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 with customer waist size.

Shoulder straps (S shapped) 8 mm foam covered inside by 2mm 3D mesh, light, strong and very comfortable20 mm daisy chain included on shoulder strap for every packs by default.

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 bag to take the bottle) closer to the hips and lower back, ensuring comfort and balance. (drainage holes at the bottom)
A system of lateral shock cords, simple, light but very efficient (two 3 mm cord x 1m = +10 gr) / by  linelocs , 12 loops in total include on the front pocket to allow shock cord lashing.

Top closure by simple and convenient by draw cord and  13 mm webbing strap, which is fixed between the start of the shoulder straps to the front pocket making load lifters effect .

13 mm webbing Sternum strap  adjustable and removable ( +10 gr) .

Every packs fit 2 meters of 2mm elastic shock cord and 1 cord lock to secure your sit pad on back or secure your pole using loops etc...

6 bottom additional loops in option.

2 removable waist pockets  for all models in option.

Available in:

3 volumes: 30 L, 40 L, 50 L
 Note: KS 50 is the most versatile for almost same weight, price and is highly compressible


   1) Nylon/dyneema X 210D  165 gr / m² (black with white line), a little bit heavier than past version for a better durability of abrasion and water resistance (PU layer more impregnated).
Bottom in cordura 500D PU coated by default.
Nylon /dyneema  X fabric is 210D nylon woven fabric contains a white Dyneema ripstop 0.25 in (6.35 mm) grid reinforcement at 0 and90 is degrees.There Also has an additional "X" pattern of nylon weave over That Improves abrasion and tear-resistance. By experience the reinforcement dyneema is very difficult to break and gives the fabric high resistance and durability. The fabric is flexible impregnated PU layer to give Improved abrasion and water resistance.

2) X-Pac: TX 07 light gray by default or check and choose other here: X-pac fabric 
Bottom and side pockets  in 330D cordura black fabric by default for TX-07
Side pockets compact and easily accessible even the pack worn.
Capacity:  for 1 L bottle/ KS 30, 1,5L / KS 40, 2L for KS 50
Fit side shock cord to maintain taller items, for ex up to 3L water pouch.
(In PIC 1 liter bottle in KS 40 pocket)
New: 20 mm daisy chain included on shoulder strap for every packs by default

Top closure by default: Draw cord/ cord lock (in PIC)
 covered by 13 mm compression strap.

 Top front mesh pocket finish by default
 Finish for fabric front pocket (also cargo) option
 with very strong mesh at the bottom to drain water.
! bottom in cordura 500D PU coated for all models of packs  330 D For X-pac tx 07 (full dyneema bottom is an option ) !

 Included front loops and bungee cord by standard fit .

4 torso sizes: 47 cm, 50 cm, 53 cm, 56 cm (44 cm is possible, please notify by email)
Mesure your back (torso size) like this:
or measure your usual backpack to be sure, bottom of the pack up to start of shoulder strap.
 or by default: for 1m68---> 47 cm, 1m74--> 50 cm, 1m80-->53cm, 1m86-->56 cm (For Asiatic people add 3 cm)
intersect the result of 3 methods to be sure.
Load lifter option is recommended for adjust your backpack torso length. (increases the length effect)
The weight of the backpack is estimated with a a medium belt (for 90 cm usual pants belt) without accessory (sternum strap, bungee etc..) and without options.
All models allow you to set your sit pad on back using shock cord included
except for 3D mesh back or anatomic belt option, sit pad pocket option, no loops at top and low part.

KS 30
Maximum total volume 30 L (23+5+1+1), fabric nylon / dyneema X 210 D, X-Pac TX 07 .
Size aprox: 12 x 29 x 70 cm max (extended collar open)
Estimated Weight (without accessories): 300 gr ,270 gr 
Recommend total loads up to 9 kg.
(SUL version of KS 30 here)

KS 40
Maximum total volume 40 L (32+5+1,5+1,5), fabric nylon /dyneema X 210 D, X-Pac TX 07  .
Size aprox: 15 x 30 x 75 cm max  (extended collar open)
Estimate weight (without accessories): 330 gr  210D, 290 gr X-Pac,
Recommend total loads up to  10 kg
 (SUL version of KS 4 here)

Strong mesh option

Dyneema fabric front pocket option.

KS 50
Volume total maximum 50 L (41+5+2+2), fabric  nylon/dyneema X 210D, X-Pac TX 07 
Recommend total loads up to 12 kg  .
Size aprox: 17 x 30 x 80 cm max  (extended collar open)
 Estimated weight (without accessories) : 360 gr, 310 gr.
330D cordura fabric front pocket custom order pack in picture below:

Anatomic belt option, side mesh pocket option, fabric option etc...

!! possibility of change in "custom order", add or remove accessory, fabric,  etc..........!!

KS packs sizes and fabric
Torso Sizes
Belt size (choose your usual pants belt size)

Ice Axes Loop:
Fit one elastic cord and cord lock by loop, add 5 gr for one.

Elastic cord and cord lock

Ice Axe Loops


Removable pocket 1L: 

Size: 5X18X12 cm with waterproof zip and 1 key holder hook inside (one/pair).
Weight: 26 gr in nylon/dyneema 210D
       23 gr in X-Pac TX 07        25gr in 200D black nylon fabric


Removable pocket
Localisation (if single pocket)
Hole for hydration pipe (with inside hook) and water pouch pocket  options for 35 cm X 17 cm X 7cm size water pouch.
(This pocket is compatible with internal pad pocket option but not with internal pocket option.)

Placed at center, allow right or left pipe way out.

H2o Options
Back in mesh 3D add 60gr approx.
Padded with not removable 8mm foam pad add 85 gr

Back in 3D mesh
Back in 3D mesh padded with not removable 8mm foam.

3D spacer mesh option
Internal pocket:
(around 19cmx20cm) made of silnylon ripstop 30 D black, mini velcro, add 6 gr

Internal pocket
Large belt option 38 mm with dual Adjust Side Release Buckle (in place of 25 mm standard) add 20 gr :

Large belt 38 mm
20 mm removable  (height adjustable) air sternum strap with whistle, weight 18 gr but add only 8gr from standard included 13 mm sternum strap.

Price: 550 JPY

Dry bag top closure system:
Velcro and 13 mm buckle:
(Add around 15 up to 25 gr according to the size of your pack and fabric.)

Top strap included

Dry bag top closure system
Sit Pad pockets pair:
(add around 15gr acc to fabric)
! you have to cut your sit pad in a trapezoidal shape, around 28x50x 23 cm according to your length back pack size !

Made with your pack fabric.
Possibility to use spacer 3D mesh (add 21 gr)
 (shaped sit pad are sold below)

Sit Pad pockets
Sit pad shaped according to your back size in white polyethylene foam 8 mm.
weight around 22 gr 
Price 1000 JPY
Zipped front pocket option 5L:
(Not compatible with cargo size option 10L)

Zipped front pocket option:
Internal pad pocket:
Using with removable pad, make the back of the pack more comfortable and more rigid.
trapezoidal shaped for KS Packs series.
Weight pocket around 15 gr
 Pad in option, shaped according to your back size in white polyethylene foam 8 mm.
weight 22 gr

Internal pad pocket
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 add 5 gr.
Cord add 6 gr , 20 mm add 18gr. The 2 solutions work well, the cord may be changed when degraded, the 20 mm webbing strap is more durable.
20 mm webbing
Linelock + cord 

Anatomic padded hip belt with load lifter strap :
 For better weight transfer on the hips, mostly for slim people (waist 70 cm up to 84 cm) included 38mm webbing and buckle, add around 50 gr.
!! Not compatible with the Sit Pad pockets option but compatible with the Internal pad pocket option !! Fabric : Black 500D by default.
Also compatible with the  frame set option.
Standard padded belt
Optional Anatomic padded belt with side load strap
Price: 2200 JPY

Waist size (choose the same than for your pants)
Mesh pocket pair on side of the pack:
 add around 30 gr in strong mesh (in picture), 20 gr in standard mesh.

Mesh pocket pair

Original "Joker hat" shaped top closure system = Dry bag top closure system associate with 20 mm load lifter strap.
 Add 20 gr :
Only Dry bag use is possible.
Price 2000 JPY
Frame set:

                     Total load in video, 15 kg = maximum confort limit.

A good UL alternative if you don't use your rolled pad to create a frame in your backpack  and to optimize transfer load on hip .
 Removable frame tube (aluminium) weight according to your torso size around 50 gr + 10 gr for  placed fixation. Associate with 38 mm waist strap/buckle option is recommended.
This option is compatible with backpack: KS packs, Alpisack, R-50, and all options even anatomic padded hip belt option.
Recommend to use with your sit pad in back, extern or intern, to keep the back of the structure.  
Price: 3800 JPY
Cargo front pocket
Twice bigger than standard = 10 L.
(Available also for Alpisack, bungee cord in option in this case ):

By default fit very strong mesh at the bottom to drain water
(top border in dyneema not included, add 500 jpy)

Fabric/ pack model
Custom front pocket form with fabric tape at top and separate top closure with triangle reinforcement patch (Top strap is not fixed directly on pocket like standard fitting but dissociate)
For X-pac tape, please specify color by Email:

Available also for strong mesh pocket.
Price: 1000 JPY

Top tape fabric
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 

4 loops at bottom
4 gear loops at front of bottom (Elastic not included)

Loops options
Strap size option:
20 mm width in place of standard 13 mm for shoulder strap webbing and top closure webbing
20 mm top closure strap webbing option add  7gr

20 mm shoulder strap webbing option add 12 gr


 Removable or fix "hand pull" :

Hand pull loops are made to insert your the thumb on the loop 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.
Removable hand pull.


20 mm strap
Y shaped top closure strap:
Add around 20 gr (for 20 mm strap) 10 gr for 13 mm strap
(Associate with the front pocket custom form option is recommended to dissociate pocket and strap)
20 mm strap



Lycra mesh shoulder pocket pair on shoulder strap Add 18 gr /pair (Not removable)
For smartphone (up to 7 cm X 14 cm),  compact camera, sun glasses or snack, not for water bottle. (Not compatible with hand pull loop option):

Price/pair: 2900 JPY

Extension collar option  + 10 cm
By default, KS 50 total length (collar full open) is 80 cm, 75 cm for KS 40, 70 cm for KS 30.
To increase a little volume (mostly if you have 56 cm torso size) you can add this option:
Weight for a KS 50 = around +17 gr (dyneema fabric), volume 5L
Price 1000 JPY