The thule capstone 22l is perhaps the ultimate in hiking rucksacks updated for 2017 the capstone 22l offers excellent breathability whilst out on the trail thanks to its tensioned mesh back panel this suspended design allows excellent air flow and makes hiking in warmer climates far more enjoyable no more sweaty backs a small compartment on the base of the bag houses the high visibility rain cover which ensures your bag is protected when the weather inevitably turns a stretch pocket on either