Using Hyperlite's proven and trusted Ice Pack as a starting point, they worked with a highly accomplished crew of Nepalese guides to up the ante and develop a pack with goal-focused features that meet and surmount the challenges climbers face throughout high-altitude expeditions. Description When ounces feel like pounds above 8K meters, reducing unnecessary weight and focusing on just what’s needed makes all the difference. Primary features include: Removable lid with zippered storage pocket Drawstring top closure Vertical daisy chain inside back panel to accommodate Voile straps and secure a single (1) oxygen bottle Removable/exchangeable hip-belt with pocket and gear loop Exterior crampon bungee attachment Dual ice axe carry Features Buckles / bungees Dual Ice Axe Pick Pocket & Figure-8 Crampon Bungee securely hold crampons and ice axes Compatible with Pods, Drawstring or Roll-Top Stuff Sacks, Prism Crampon Bag and Ice Screw Case, Hyperlite Mountain Gear Removable Hip Belts Daisy chains Four external, vertical daisy chains, Shoulder Strap Daisy Chains, Single internal daisy chain Top closure Drawstring closure system with extendable collar and cinch cord. Floating lid allows for pack expansion Hip belt Removable/changeable hip-belt with pocket and gear loop Back 1/4" Foam padded back panel with integrated plastic sheet Pack accessory options Prism Ice Screw Case, Prism Crampon Bag, The Insulator, Stuff Sacks & Pods Side straps Extended side compression straps for lashing gear and horizontal compression Top compression straps Top Y-strap -- Designed to compress and secure gear Shoulder straps Hardline with Dyneema® shoulder straps with 3/8” closed cell foam and spacer mesh Stays Two removable, contoured aluminum stays Sternum straps Adjustable sternum strap with self-tensioning elastic and whistle Sealing Seam tape on all vertical side seams and behind all sewn-on pack features Specs Volume 55L Load Capacity Up to 50lb Material DCH150, Fully Woven Dyneema®, 210d Nylon Weight 43.5oz | 1234g Back Width 10.5" | 26.7 cm Height 38.0" | 96.5cm Top Circumference 40.0in | 101.6 cm Bottom Circumference 33.5" | 85.1 cm Country Mexico Care To maximize the performance of your Hyperlite Mountain Gear products and ensure that they live a long, reliable, and productive life, it is recommended that you familiarize yourself with their Care Instructions.