The ARCTERYX Alpha AR 20 pack suits those in pursuit of an elegant "light and fast" solution to day climbs, doing away with extraneous pockets and features. It has been stripped down to only what is "essential" in the classic ARCTERYX style. They have given you a blank canvas with which to integrate into climbing setups. The climbers they designed this pack for are accustomed to the simplicity of summit packs. It feels surprisingly robust for its weight, especially when packed to a climb-ready state.