Check the listing for details. Hydration Backpack with 2 Liter Water Reservoir, Lightweight Insulated Layer. Color: Holographic Silver, Condition: New with tags. Listed at 39.99 USD. Fashionable & Comfortable: Lightweight water pack with 2L water bladder; Stylish ultra-light design with cushioned, breathable mesh back panel make sure you comfortablely wear the pack for hours; Adjustable shoulder/chest straps fits all sizes Thermal Insulation: Insulated thermal layer keeps your water cool up to 4 hours; Extra 5 independent compartments with easy grip zipped pulls, provide large capacity for storage and organization; Great for festivals, biking, cycling, hiking, running and outdoor use PVC & BPA Free water bladder with 2 Liter volume: Made with 100% BPA and odor free material; Double sealed edges greatly increase durability; Leak proof screw cap with 3.125 inch wide mouth opening for easy filling and cleaning Quick release Leakproof Connection: Soft silicone bite mouthpiece with dust cover to keep dirt out; Simply bite the mouthpiece and pull out the tip of the valve for a smooth water flow; 40" long tangling free tube with insulated cover for easy drinking Detachable Tube: The pushing and release tube mechanism make sure the water bag is well sealed and the tube is easy to remove for cleaning and storage; Detailed instruction printed on the water bladder for a quick start on using the hydration pack