The Arbor Pack has a main compartment that closes with a large flap pocket and holds your inventory of everyday goods—from books, lunch and a shell, to climbing shoes and chalk bag. A zippered pocket on the underside of the lid stashes a wallet and phone. Inside, a raised, padded sleeve with a buckle closure protects most 15" lapShirts from jarring knocks and also doubles as an insulated hydration reservoir when you hit the trails. Human Curve® straps conform ergonomically to your shoulders and upper chest for all-day comfort under loads. Accessory patches and a fixed webbing loop carry ice tools, crampons or a yoga mat. Made from durable 600-denier 100% recycled polyester with a polyurethane coating and a DWR (durable water repellent) finish.