Description Soak up every moment you have outdoors, and not a drop more, with the Downburst Men's 36. This daypack pairs our highly breathable AirSpeed™ suspension with an IPX5 waterproof main compartment and quick-dry external materials—delivering the capable fit and stability Osprey is known for while leaving nowhere for water to hide. Made with bluesign® approved 100% recycled nylon main body fabric. Features IPX5-rated waterproof main compartment with RF-welded construction Internal zippered mesh pocket with key clip keep keys/phones/wallets dry and protected PU-laminated YKK RC external zippers provide extra weatherproofing External hydration reservoir sleeve with center pass-through port PU-laminated YKK RC external zippers provide extra weatherproofing Dual upper and lower side compression straps Rugged, gusseted front compression pocket manages overloads, keeps layers and shells accessible Dual-access side bottle pockets keep bottles secure and reachable Dual zippered hipbelt pockets keep smaller items handy and accessible on the trail Ice axe/trekking pole loop with bungee tie-off Stow-on-the-Go trekking pole carry Sternum strap with whistle Welded PU laminated YKK zipper neatly secures main compartment Top can be rolled twice before buckling for maximum water resistance Downfacing zip flap ensures weather resistance even if flap is left unsecured Full Waterproof Construction: The entire pack's interior is thoroughly protected—from a light drizzle to heavy showers—with an IPX5 waterproof (non-submersible) rating thanks to its fully RF-welded, TPU-laminated construction. Category-Leading Fit & Comfort: Adjustable AirSpeed suspension provides category-leading fit, comfort and ventilation, designed to dry out quick whether you’re hiking in heat and humidity, or through a downpour. No-Compromise Gear Carry: For quick-access essentials and drying raincoats, non-waterproof pocketing on the pack’s exterior, including bottle pockets, a large backpanel stash pocket and an external hydration sleeve, are made of breathable, water-shedding materials that’ll dry quick. Specifications Weight: 1.53kg Capacity: 37L Dimensions: 65 x 35 x 32cm Material(s):  MAIN: bluesign® approved 100% recycled 210D nylon w/ high-tenacity double ripstop, coated with TPU laminate ACCENT: bluesign® approved 100% recycled 70D nylon, DWR treatments made without PFAS BOTTOM: bluesign® approved 100% recycled 420D nylon, DWR treatment made without PFAS Sizing guides: Osprey Men's Downburst 36 Water Resistant Backpack