WASING 55L Internal Frame Backpack Hiking Backpacking Packs for Outdoor Hiking Travel Climbing Camping Mountaineering with Rain Cover WS-55Lpack 1. Man-Made Materials,BOTTOM COMPARTMENT- Zippered Access. It Comes With An Internal Zippered Divider. 2. WATER-RESISTANT- Water-Resistant Rip-Stop Polyester As The Fabric Can Quickly Slide Water Aside Before Water Has A Chance To Penetrate It. 3. Molded Foam Back Panel With Airflow Channels To Keep Your Back Cool And Dry.Single Contoured Aluminum Frame Bar Can Be Adjusted To Fit The Shape Of Your Back. 4. Size: (H)* (W)* (L) (27.1*12.5*9.8inch)Volume: 55L 5. WARRANTY- Includes 90 Days Limited Warranty.