Hyperlite Mountain Gear

Southwest 55L Backpack

What Our Gearhead® Experts Are Saying:

"I’ve put the Southwest 55L through canyons, alpine passes, and plenty of bushwhacking, and it just keeps performing. The Dyneema fabric is ridiculously durable yet still lightweight, and the solid exterior pockets are perfect for stashing gear I want handy but protected. It’s my go-to pack for anything from a week on trail to rugged desert miles."

Named for the rugged landscapes that demand resilience, the Hyperlite Mountain Gear Southwest 55L Backpack is purpose-built for hard miles, harsh conditions, and big trips. Constructed with 100% waterproof Dyneema Composite Fabric, this ultralight pack is as tough as the terrain it’s meant to explore. The roll-top closure and proprietary seam sealing keep weather out, while the solid exterior pockets protect quick-access essentials from rocks, brush, and desert grit.

With a 55-liter internal volume and additional external storage, the Southwest is ready for anything from weekend treks to thru-hikes. Removable contoured aluminum stays and a Hardline hip belt distribute weight efficiently, while the foam-padded back panel and shoulder straps keep the fit comfortable over long distances. Top, side, and Y-strap compression systems stabilize the load when we’re carrying less, and hydration compatibility ensures we stay fueled for every climb, canyon, and descent. For adventurers who demand strength and simplicity in the backcountry, the Southwest is a proven ally.