The ergonomic, waterproof Sprint Dry Pack combines light weight with durability. Sea to Summit’s design goal was to create a day pack that would be a hybrid of the best aspects of Sea to Summit’s Ultra-Sil Dry Day Pack and the 420D DryPacks (Carve, Rapid and Flow). The main compartment utilizes a fully seam taped 210D TPU laminated fabric, while the base is made of a high abrasion-resistance 420D Nylon. The shoulder straps and back panel design are a lightweight version of Sea to Summit’s 420D harness style: besides great support and fit, they are ventilated to dry quickly.