The VaporAir Lite takes our Adaptive-Fit feature to the next level with a new "set it and perfect it" hook & loop design. Made of lightweight and breathable mesh & stretch woven materials for maximum comfort. Equipped with a 2L bladder with quick release valve and 7 pockets, including multiple back pockets for additional items, plus bottle pockets in the front fit up to 22oz flasks. Maximum Comfort Soft, Breathable Mesh & chafe-free materials. Adaptive Fit Features two separate adjustable hook and loop panels at the lower lumbar area that allows you to customize the size of the run vest for best fit - "Set it & Perfect it". Extra Storage to go 7 pockets, including multiple back pockets for bladder (2L included) and additional items, plus bottle pockets in the front fit up to 22oz flasks. Features: Unisex sizing to fit all body types Set It and Perfect It adjustable sizing system for tailored fit Adjustable sternum straps Soft, breathable mesh & chafe-free materials Equipped with a 2L bladder with quick release valve 7 pockets, including multiple back pockets for additional items Front pockets fit bottles and flasks up to 22oz Reflective hits for 360-degree visibility 60% Nylon, 40% Polyester Storage Capacity: 244 cu in/4 Liters Wash and Care: Easy to love and easier to care for. Hand wash only - Nathan Power Wash Recommended. To clean bladder remove tubing, rinse tubing and bite valve. Turn bladder inside out rinse dry standing up. Nathan Unisex VaporAir Lite 4 Liter Hydration Vest