The Pilchuck 45 is a modular pack system that gives hikers the freedom to interchange their packs to fit every adventure. The frame is the central component of the Pilchuck pack. The trampoline style frame provides optimal ventilation while the swiveling hip belt gives hikers unhindered movement. Since the frame is removable, adventurers can swap out the type of pack they use depending on their activity. The Pilchuck 45 pack is just one pack within the Pilchuck family. It is a medium sized pack for short backpacking trips. Features include daisy loop chains, compression straps, and a roll-top closure. The roll top allows hikers the freedom to expand or compress the pack as they need.