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Back view of Sierra Designs Flex Capacitor backpack with a small capacity interior load

2017, 2018, and 2019 Budget Pick - Backpackers.com

10 Best Lightweight Backpacks of 2018 - CleverHiker

Best Ultralight Backpacks of 2018 - GearJunkie

One of The Best Summer Packs of 2017 - Outside Online

The Flex Capacitor features a unique patent pending gusset system that allows the pack to quickly and easily expand from 40-60 liters with the adjustment of a few straps. Instead of expanding up like other packs, the circumference of flex expands to provide a more stable and comfortable load carry.

flex-360-small.jpg

Key Features


Packbag Key Features

  • Expandable 40-60L volume (volume varies between sizes)
  • Ultralight weight design
  • 2 torso sizes (non-adjustable)
  • 4 hip belt sizes
  • U-shaped top access zipper
  • Zippered stash pocket on lid
  • Removable reservoir sleeve
  • Shoulder strap water bottle pocket
  • Stretch mesh side water bottle pockets
  • Two hip belt pockets
  • Compression straps
  • Ice axe/trekking pole loop

 
Suspension Key Features

  • Lightweight "Y-FLEX" suspension
  • EVA foam hip belt and shoulder straps
  • Raised lumbar and scapula pads (EVA foam)
  • Load lifter straps
  • Hip belt stabilizer straps
  • Adjustable hip belt

Materials

  • Body Fabric: 100D Nylon-Poly Ripstop
  • Secondary Fabric: 420D Nylon Oxford
  • Stay Material: DAC Pressfit Aluminum
  • Number of Stays: 1 "Y-FLEX" stay

Tech Specs and Sizing


PACK SPECS S/M M/L
TORSO SIZE 16" - 19" 18" - 21"
VOLUME (Liters) 39 - 56L 42 - 60L
VOLUME (Cubic Inches) 2400 - 3400 2550 - 3650
WEIGHT 2 lbs. 9.2 oz. (With S/M hip belt) 2 lbs. 11.2 oz. (With M/L hip belt)
DIMENSIONS (LxWxD) 28.5" x 13 "x 10" 30" x 13" x 10"
MAX COMFORT WEIGHT 35-50 lbs. 35-50 lbs.

HIP BELT SPECS XS/SM SM/MD MD/LG LG/XL
WEIGHT (Ounces) 10.2 11 11.5 12.2
WEIGHT (Grams) 290 310 330 350
HIP BELT FIT RANGE* (Inches) <29 29 - 32 32 - 35 >35
HIP BELT FIT RANGE* (Centimeters) 74 74 - 81 81 - 89 89

*This is a hip measurement, not a waist measurement.  Please watch pack fit video to learn how to properly measure.

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Moosejaw: https://www.moosejaw.com/product/sierra-designs-flex-capacitor-40-60-pack_10333406?cm_mmc=P2P-_-sierra-designs-_-na-_-sierra-designs-flex-capacitor-40-60-pack&ad_id=sierradesigns
Enwild: https://www.enwild.com/sierra-desings-flex-capacitor.html?utm_source=sierra-designs&utm_medium=ptop
    • Sierra Designs Flex Capacitor 40-60 Pack
    • How to pack a backpack: Organization & load distribution
    • How to Measure & Fit the Sierra Designs Flex Capacitor Backpack

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    SKU:
    80710216

    Flex Capacitor

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    $199.95
    Quantity:
    Out Of Stock
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