Lowe Alpine AirZone Trek 35:45 M-L

210D Ripstop Nylon with a HydroShield Coating - For lightweight, durable weather protection. DWR - Durable water repellent treatment for added water resistance. Rain Cover - For heavier weather. Formknit Backsystem - Lightweight, seamless and soft against the body, this ventilated, strong, back system is suspended away from the back for excellent ventilation and improved comfort. Hipbelt with Forward Pull Webbing - Works in collaboration with the backsystem for a comfortable, snug, secure fit and weight distribution.