Sierra Designs Flex Capacitor 40-60 Rucksack - Butterscotch

The Sierra Designs Flex Capacitor is a lightweight backpacking pack built to expand with your trip. Loosen the horizontal gussets for an extra 15-20L of capacity on longer hauls, or cinch it down for compact, fast summit-day loads. A lightweight Y-Flex suspension carries well above its weight class, dual-adjusting shoulder straps tailor the fit, and quick-stash pockets on the straps, sides, hips and bucket lid keep essentials to hand. Constructed from durable nylon for rough backcountry conditions.

Key Features

• 20L Adjustable Volume - Expanding gussets flex the pack from 40L to 60L
• Lightweight Y-Flex Suspension - Superior support that punches above its weight
• Dual-Adjusting Shoulder Straps - Tailor the pack fit to your torso
• Summit Sack Hydration Sleeve - Doubles as a removable summit pack
• Strap and Side Storage - Two hydration pockets on the straps plus two stretch mesh side pockets
• Zippered Hip Belt Pockets - Easy-access storage on the move
• U-Shaped Top Zip - Quick access to the main compartment

Ideal For

• Backpacking - One pack for weekends and longer hauls
• Summit Days - Cinch down for a fast, compact load
• Variable Trips - Adjustable volume adapts as your kit changes
• Lightweight Missions - Support without the weight

Technical Specifications