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. The main image displays the colour youre about to add to the shopping cart. Images displaying details, may display another colour. Osprey nowadays offers a rough recommendation for cargo. For this pack it's 14 - 20 kg. The limits are not carved in stone, but work as nice general guidelines. - 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