Sierra Designs
Sierra Designs Flex Capacitor Packs 40-60 L Peat Small/Medium
Updated May 13, 2026
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About this product
Sierra Designs Flex Capacitor Packs 40-60 L Peat Small/Medium.
Meet the versatile pack that hauls it all.
The Flex Capacitors is a beast of backpacking pack constructed from durable nylon for rough conditions in the backwoods and built with adjustability in mind.
Loosen the expanding horizontal gussets for an additional 15-20L of cargo capacity on longer backpacking trips or cinch it tight for smaller compact loads on fast summit days.
Plus ample quick-stash solutions on the straps sides and bucket lid ensure there are plenty of places to store your mid- trail essentials.
However you pack it the Y-Flex suspension adds support so this lightweight backpacking backpack can hit well above its weight class.
Flex Capacitor Rain Cover sold separately.
Specifications
- Size:
- 16 - 19 in
- Weight:
- 50 lb
- Weight:
- 2.72 lb
- Capacity:
- 2442-3661 cu / 40-60
- Volume:
- 40 - 60 liters
- Material:
- 100D
- Fabric/Material:
- 420D
- Width:
- 12.5 in
- Depth/Thickness:
- 12.5 in
- Height:
- 25 in
- Weight:
- 35 lb
Features
- Sierra Designs 40-60L Flex Capacitor Backpack Sierra Designs 80710223PT-S/M: Flex Capacitor Packs 40-60 L Peat Small/Medium
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