Simms Headwaters Backpack HickoryDestined for elevated backcountry expeditions, the new Headwaters Backpack divides, conquers, and corrals with a rugged 630 Denier build, magnetic roll top closure, ample storage options for fishing necessities, and an ergonomic fit that comfortably handles your long hauls and heavy payloads. Durable and water resistant 630 Denier High Density Oxford Nylon fabric with TPU coated frontside and PU coated backside Coated water resistant YKK Aquaguard