Custom Ultra Packs

Ultra 20L Curve

CUSTOM ULTRA PACK LEAD TIME IS 4 WEEKS Updated: September 8, 2023


Ultra 20L Curve

***2023 UPDATES***

  • New taller side pockets
  • Adjustable shoulder strap pockets 
  • UltraStretch mesh comes standard
  • UltraStretch Upper Side Pockets
  • Easy to adjust webbing


  • 20L body plus an additional 10+ liters of external pockets totaling 30L of pack space
  • Designed to comfortably carry around 20 LBS
  • 3″ wide S-shaped shoulder straps constructed of spacer mesh and close cell foam
  • Optional adjustable shoulder strap pockets are designed to fit a 700 ml water bottle
  • Single top strap (removable)
  • Top buckle roll top closure with 2 KAMsnaps  AND
  • Pull down side closure with removable straps
  • 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
  • Medium torso (19″-20.5)  Small torso (17″ – 18.5″) Extra Small Torso (15″ – 16.5″)
  • Lower V Loop
  • Seam Taped


  •  14.2/13.6Oz. | 402/385 Grams
  • Weight with all included straps/all straps removed
  • Bottom circumference: 31”
  • Top circumference: 34”
  • Pack height when fully unrolled: 28”
  • Back of pack: 10”


  • Ultra 200
  • Shoulder straps: 210D ROBIC Black
  • Front pocket: UltraStretch
  • Bottom Pocket: Spandex/Nylon
  • 3D Spacer mesh
  • Close cell foam


Three styles of hip belts can be found below.

Fanny packs can be found here

1″ removable hip belt can be found here

The minimalist’s padded hip belt can be found here



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Torso Sizing Gallery

Choosing the Right Pack:

Torso Sizing:

Hip Belt Size

PLEASE MEASURE YOUR WAIST! Just because you wear a 32 pants size doesn't mean you have a 32" waist. 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, SO PLEASE MEASURE CORRECTLY!!! 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. If you fall in the meddle of two sizes we recommend sizing down. 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.