Gregory Makalu Pro Specs: Volume: 4563 (Medium) Weight: 4 lb. 14 oz. (Medium) Top loading design Auto-Cant harness and Stealth waistbelt 210 Denier Micro Spectra Shelter-Rite reinforced bottom Twin 3/4 inch 7075-T6 aluminum stays Top lid converts to fanny pack Internal 110 oz. hydration system Internal vertical dividers 11 inch storm collar Color: Green Micro Spectra Sizes, Capacity, Weight, Torso Length: Large: 4880 ci./80 liters, 5 lbs. 1 oz./2.30 kg, Torso 20" and up Medium: 4563 ci./75 liters, 4 lbs. 14oz./2.21 kg., Torso 18" to 19.5" For more info or to "Secure" ORDER the Gregory Makalu Pro from Backcountry Gear Ltd. Click Here! Comments: Gregory has added a new pack to their Professional Series - the Makalu Pro. For over 25 years Wayne Gregory has worked with top alpinists like Ed Viesturs to develop the most technically advanced, high-altitude packs available. The Makalu Pro represents the latest advance in this series. This lightweight pack has been designed to specifically handle the technical demands of the hard core backcountry skier, mountaineer and lightweight backpacker. The new 210-denier Micro-Spectra fabric of the pack is super strong and extremely light. Every item on this pack has been designed with weight and strength in mind, down to the ultra-lightweight, partial framesheet and top-loading, slim-body profile. The Stealth waistbelt features detachable racking loops for alpine climbs and technical approaches. If you need substantial capacity, but weight is critical, the Makalu Pro should do the trick.