Detail images display different colour packs. The Hikelite is a streamlined package - if needed, it easily slips into everyday use, without looking like you're on your way to do some ice climbing. - AirSpeed back panel enables air to move between your back and the pack - As opposed to the size chart, this pack's size S/M suits back lengths between 38 - 48 cm, while M/L suits 45 - 56 cm - Light weight peripheral frame keeps the pack in check regardless of how full it is - Integrated, detachable rain cover - Small item pocket with key clip - Internal pocket for hydration bag (hydration bag not included) - Stretchy side pockets - Stretchy front panel pocket - Safety whistle in the chest strap buckle - Compression straps - Trekking pole attachment - The hip belt has two pockets, one with a zipper and the other one an open one - Material: 100D nylon mini diamond shadow - Reinforcements with 420 denier nylon - PFAS-free, PFC-free, and bluesign fabrics made of GRS certified recycled fiber