STORAGE: Interior Volume: 2400 cu. in. (40L) External Volume: 600 cu. in. (9.8L) Center pocket: 300 cu. in. Side pockets: 150 cu. in. DESIGN & DETAILS: Three external mesh pockets Removable, contoured aluminum stays Dyneema(R) Hardline 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 Dyneema(R) Hardline hip belt with 1/8" closed cell rigid foam and spacer mesh Dyneema(R) Hardline 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