Hyperlite Mountain Gear
Hyperlite Mountain Gear Unbound 40
The Unbound 40 is HMG's fast-and-light pack for dialed kits, with a stretch front pocket and bottom pocket aimed at hikers who move all day and camp minimally. At 40 liters it suits sub-10-lb base weights and shorter resupply intervals.
Price and availability on Hyperlite Mountain Gear’s site may differ.
Specifications
What do these specs mean? →Sizes Available
| Capacity | Price | Weight |
|---|---|---|
| 40 Lthis pack | $405 | 2.16 lbs |
| 55 L | — | — |
Features
Pros
- ✓The bottom stash pocket — grab a layer or snacks without stopping — is the feature owners say they can't go back from.
- ✓Waterproof Dyneema construction means no pack liner and no wet-gear anxiety.
- ✓At 1.72 lbs with removable stays it competes with frameless packs while carrying meaningfully better.
- ✓The stretch front pocket (unlike the Southwest's solid one) swallows a soaked tent for on-the-move drying.
- ✓Made-in-Maine build quality matches its flagship siblings.
- ✓The 40L discipline forces a genuinely light kit, which converts say improved their whole system.
- ✓Clean compression lets it double as a big daypack or peak-bagging bag.
- ✓The white-and-black aesthetic carries the same HMG cachet.
Cons
- ✗40 liters plus no bear-canister fit rules out canister country and long food carries — a hard constraint, not a preference.
- ✗$349 for less volume than a $199 Flash 55 makes the per-liter math painful.
- ✗The 30 lb ceiling is firm; winter or water-heavy trips overwhelm it.
- ✗Same clammy foam-on-back feel as every HMG.
- ✗Fixed sizes, minimal try-on options, and a boxy fit — the standard HMG sizing gamble.
- ✗The stretch pocket wears faster than the Southwest's solid fabric in brush.
- ✗Hipbelt pockets remain small for big phones.
- ✗It assumes an already-dialed kit; beginners who buy the aesthetic first find it unforgiving.
Common Questions
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Hyperlite Mountain Gear
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The Windrider is the Southwest with a large mesh front pocket in place of solid Dyneema, so wet gear can drain and dry. The 2025 overhaul moved the line to Dyneema Woven Composite and widened the shoulder straps.
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