Nathan - Trail Mix Plus 3.0Dual 10oz flasks, no bounce fit, and smart storagehydration meets performance on the move. Belt offers multi directional limited stretch that contours body and eliminates bounce Updated holster design that provides easy, one handed, on the fly access to hydration and nutrition Two 10oz 300mL flasks with Push Pull Blast Valve caps New large expandable front zippered pocket designed to fit most phones Exterior mesh pocket for easy fast storage Two shock