Hyperlite Mountain Gear Unbound Pack is an ultralight thru-hiking backpack, built with waterproof Dyneema Composite Fabric for multi-day backpacking, section hikes, and fastpacking while supporting loads up to 40 lbs. Key Features Dyneema Composite Fabric: White DCH50 main body (black DCH150) with DCH150 bottom panel ensures 100% waterproof durability and lifetime robustness. Mobile Storage Pockets: Dual-entry stretch mesh front pockets, oversized side bottle pockets, and bottom stash pocket with trash port for quick access. Removable Hip Belt: Padded dual-density foam design customizes fit as thru-hike weight changes; includes belt pockets for essentials. Single-Stay Suspension: Adjustable aluminum frame sheet with foam backpanel transfers weight efficiently for medium loads. Roll-Top Closure: Side-pull compression straps, daisy chains, and hydration compatibility optimize volume and gear attachment.