Pipergear Drifter A full featured large size pack with padded mesh paneled back for breathability and custom zipper pulls. Spacious main compartment with a rear nylon sleeve for a hydration reservoir. A spacious front compartment with an organizer panel. 2 side external side pockets for your water bottles or snacks and a top padded zippered pocket! Compression straps to secure the load, padded mesh shoulder harness with sternum strap for a sturdy, comfortable fit.