1.Main material in 600D polyester, high dense woven, waterproof 2.Large zipped bottom opening for easy access to the gear you have packed at the bottom 3.Top loading main compartment with guaranteed drawstring closure 4.Large dual-compartment sac, volume adjustable with the compreddion straps and lid extension 5.Two sides zippered pockets, volumn adjustable with two cmpressions traps 6.One front mesh pocket with elastic drawcord attached, easy access to gear 7.Rapid adjustable waist belt 8.Top lid zipper pocket 9.Twin 3/4 aluminium stays anatomically curved with lightweight frame, flexible and supportive 10.Back panel padded with breathable air mesh tex and hollow chamber foam, spiral air ventilation channel 11.Ice axe loops attachment 12.Hipbelt, inner side has thick and softer foam with air mesh tex lining, for increased load transfer, anti-slip pad 13.Shoulder padded with air mesh tex 14.Stabiliser sternum straps allow for optional positioning of the backpack 15.Hydration system compatible 16.Loading compression straps for stabilizers