The Saruk Pro pack series is the manufacturer's most durable choice and has a sturdy frame, helping you carry the load on your hip belt as possible. The materials are made to last, you won't have to baby this pack like you might have to do with ultralight alternatives. - Carry Comfort 4.0 carrying system keeps the pack in check and brings the weight on the hip belt - Double aluminium frame bars and stays - Zippered hip belt pockets - Two bellow type side pockets - Two open stretch side pockets - Small item pocket with key clip - Large kangaroo pocket at front panel - Floating flap with two pockets - Front panel with two strong loops for extra loads - Rain cover included - Lower compartment with a divider you can open - Inner compartment for a hydration bag (sold separately) - Roll top spindrift skirt reduces snow coming in - Check the extra image for how to measure your back, the idea is to find the distance between the height of your iliac crest and the most protruding neck vertebra