CamelBak Women's 2016 Day Star 18 Hydration Pack Polyurethane Nylon Women's-Specific pack designed to carry hydration and essentials for day hikes Antidote reservoir features: easy open/close cap, lightweight fill port, Dryer arms, center baffling and low-profile design Key pack features: air Channel back panel, women's-specific s-curved harness, hike essentials organizer pocket, side compression Designed to carry extra layers, food, trail maps, phone Camelbak Got your Bak guarantee: if we build it, we'll Bak it with our lifetime guarantee