Custom X-Pac Packs

Curve X35L

CUSTOM X-PAC PACK LEAD TIME IS 7 WEEKS Updated: April 12, 2021
(1 customer review)

Curve X35L

Please use our measurements and sizing charts when building a pack. Just because your current pack is a small doesn’t mean our pack in a small will fit the same. See the bottom of this page for all sizing information


  • 35L body plus an additional 10+ liters of external pockets totaling 45L of pack space
  • Designed to comfortably carry around 20 LBS
  • 3″ wide S-shaped shoulder straps constructed of spacer mesh and close cell foam
  • Side compression with lineloc 3 adjusters
  • 4 trekking pole loops (includes 4 each of 12″ shock cords with mini cord locks)
  • Top buckle roll top closure with 2 KAMsnaps
  • Top Y strap
  • Lower V Loop
  • Loops for adding a sit pad against your back. (shock cord not included)
  • Adjustable flat bottom side pockets with drain hole. Each pocket fits 2 1L smartwater bottles securely. Pockets adjust with shock cord and mini cord locks.
  • 2 1” loops for attaching a removable hip belt or fanny pack to
  • Dual adjust sternum strap
  • Long shoulder straps are for a chest size greater than 42″


  • 13/22 Oz. | 369/624 Grams (weight will vary due to torso size and hip belt size)
  • Bottom circumference: 33”
  • Top circumference: 38”
  • Pack height when fully unrolled: 34”
  • Back of pack: 11.5”


  • Body VX07 (Ultralight) or VX21 (light weight)
  • Side pockets VX21
  • Bottom and back of hip belt VX21
  • Shoulder straps 210D ROBIC Nylon Black
  • Front pocket: 4 way stretch Lycra mesh
  • Spandex/Nylon mesh
  • 3D Spacer mesh
  • close cell foam


Free pack liner with every X35L



Fanny packs can be found here

1″ removable hip belt can be found here

The minimalist’s padded hip belt can be found here


Front & Back Body Color (VX21) *
Side Body Color (VX21) *
Front & Back Body Color (VX07) *
Side Body Color (VX07) *
Side Pocket Color (VX21) *
Logo Stripe Color (VX21) *
Torso Size *
Shoulder Straps *
Shoulder Strap Pockets *
Add Hip Belt
Hip Belt Size
Padded Hip Belt *
Add Bottom Pocket *
Add Load Lifters *
Torso Sizing Reviews Gallery

1 review for Curve X35L

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Showing 1 of 1 review (5 star). See all 1 review
  1. Coulter Messmer

    *Initial First Impressions, no actual miles*

    Overall the pack is excellent, shoulder straps are super comfy, stitching is straight, thumb loops on the shoulder strap adjustment are a nice touch. I picked the VX07 Navy Blue, which appears slightly darker than one of the pictured packs and I feel like it’s more comparable to the actual fabric sample picture.

    A few criticisms/preferences. No sewn-in ice axe loop (my fault for not noticing it missing in the description). The sternum and top Y strap are hard to adjust, I would prefer a buckle with more of a “thumb paddle” and the webbing appears to be a little wide for the buckle so the edges curl inside the buckle itself, it may become easier over time. The excess sternum strap end is not finished (sewn into itself to make a tab), so given the stiffness of the buckle, it’s hard to keep a grip while trying to adjust it. The LiteAF logo is not square and off by about 1/8″, purely cosmetic but one of the first things I noticed.

    Tech Specs: Torso Size Small, Standard Shoulder Straps, VX07 Main Pack Material, Bottom Pocket
    Weighs 16oz (according to my super-accurate luggage scale)

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Choosing the Right Pack:

Torso Sizing:

Hip Belt Size

Below you will find a list of sizing for our hip belts. The first measurement (the absolute minimum) is the total length of foam and clip. The second measurement is the maximum the straps will extend to. Using a measuring device, pull it around your back at the level of your iliac crest and connect it in front of you. This will be your hip belt size. Using this pack for a thru-hike? Please take weight loss into consideration when selecting your hip belt size.

Small Hip Belt - 25" of foam and a total of 38" of adjustability.

Medium Hip Belt - 28" of foam and a total of 44" of adjustability

Large Hip Belt - 33" of foam and a total of 48 " of adjustability

X Large Hip Belt - 40" of foam and a total of 55" of adjustability

Torso Size Info

All packs are built to your specific torso. To find your torso length you will need to find your C7 vertebrae and your iliac crest/hip shelf and measure the distance between them. Still need help finding your torso? Check out this video

Packs without a hip belt will measure from the bottom of the pack to where the shoulder straps are sewn in. This is the same for packs with a 1″ removable hip belt or fanny pack.

Packs with a padded hip belt will measure from the center of the hip belt to where the straps are sewn in. If you choose to have load lifters then your pack will measure from center of hip belt to the load lifters.