Kestrel series packs are made of a tough bluesign Nylon fabric. They might not be "racing light", but they offer reliable performance for years. The carrying system and general shape of the pack are optimized for use where you have to squeeze through narrow spaces. - Men's model (the women's model is called Kyte) - Adjustable AirScape back panel allows air to flow - Stow-on-the-Go hiking pole holders: no need to stop when hanging or detaching your poles - Stretch side pockets for water bottles - U-shaped zip offers direct access to main compartment - Dedicated zipper for the lower compartment - Two ice axe holders - Chest buckle with integrated whistle - Fit-on-the-Fly hip belt with two zippered pockets - Two flap pockets and lashing points for extra straps - Compression straps - Two daisy chains on front panel - Compatible with hydration bladders - Detachable sleeping pad straps - Kangaroo pocket at front panel: easy and fast - Integrated rain cover - PFAS- and PFC-free