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 COMFORTSoft, 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".