The North Face Hammerhead is focused on keeping you hydrated. The 100oz Nalgene bladder is super easy to fill and use, thanks to its quick connect hose and Big Bore opening. The Hammerhead has a leak-proof Bite Me valve and the inside has an anti-microbial coating, so it won’t get funky. Aside from carrying enough water to get you through your day hike or ride, the Hammerhead has in internal organizer, and roomy outer mesh pockets for stashing additional water bottles, layers, and food. The perforated-foam back panel keeps you cool and dry, as will the Airmesh shoulder harness.