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* * * * * * * * * * * * SHIPPING EVERY DAY UP TRAIL & BEYOND! IN PERSON LOCATIONS ARE CLOSED UNTIL MARCH 2025. * * * * * * * * * * * * *

Hyperlite Mountain Gear 55 Southwest Ultralight Backpack


When calloused hands, sunbaked river sediment, and maybe a little blood all complete “your look” in the rocky canyons and otherworldly formations you live to descend and emerge from, the Southwest is as reliable a compañero as you’ll find. When the going gets narrow, and the temperament of the terrain is always abrasive, the Southwest is built to play rough. The Southwest 55L Ultralight Backpack is ideal for weekend, section, or thru hikes where resupply points are less frequent, or for trip needs flexibility. When the extra volume is not in use, the 55’s top can roll down enough to make the overall size of the pack similar to the 40, but that additional space can come in pretty handy when you need it.

The superlight but robust main compartment of the Southwest is constructed with 100% waterproof Dyneema® Composite Fabrics. The external Dyneema®Hardline pockets provide an extra line of defense around the gear you’ll want to quickly reach at any time without having to open and sort through your carefully organized pack.

For the best experience possible with our backpacks, we recommend you complete your pack with our Pods and Stuff Sacks. They’re the key to a comfortable, highly-organized, and nearly 100% waterproof pack system.


2.00 lbs | 32.11 oz | 910g (White) 
2.18 lbs | 34.97 oz | 991g (Black)
Weight may vary slightly by torso size.


  • Three external, solid Hardline with Dyneema® pockets
  • Removable, contoured aluminum stays 
  • Hardline with Dyneema® shoulder straps with 3/8” closed cell foam and spacer mesh
  • 1/4” foam back panel pad
  • Compression System
    • Roll-Top closure system with side compression straps for vertical compression
    • Side compression straps for horizontal compression
    • Top Y-strap compression -- Designed to secure gear
  • Hardline with Dyneema® dual-density hip belt with 1/8” closed cell rigid foam, 1/4” closed cell foam and spacer mesh
  • Hardline with Dyneema® zippered pockets on hip belt with #5 YKK zipper
  • Adjustable sternum strap with self-tensioning elastic
  • Ice Axe loop
  • Hydro port and internal mesh hydro sleeve
  • Four exterior triglide buckles for optional pack accessory straps
  • Proprietary seam sealing on all side seams and behind all sewn-on pack features


2.00 lbs | 32.11 oz | 910g (White) 
2.18 lbs | 34.97 oz | 991g (Black)
Weight may vary slightly by torso size.

    Load capacity: Up to 40 lbs


    • Body: DCH50 (White)
    • Body: DCH150 (Black)
    • Bottom: DCH150
    • External Pockets: Hardline with Dyneema®

    Click here to learn more about our fabrics.


    • Internal: 3400 cu. in. (55L)
    • External: 600 cu. in. (9.8L)
    • Center Pocket: 300 cu. in.
    • Side Pockets: 150 cu. in.


    • Top Circumference: 40” | 101.6cm
    • Bottom Circumference: 33.5” | 85.1cm
    • Height (fully unrolled): 34” | 86.4cm
    • Back Width: 10.5” | 26.7cm


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