Hydro Pack  The Hydro Pack is a comfortable, non-intrusive water carrier ergonomically designed to offer a close, low profile fit on the rider.    *  Water resistant fabric combination of 840D ballistic nylon twill and 420D honeycomb nylon with abrasion resistant qualities for durability.      * Reflective piping and logo screen prints for visibility.      * Dedicated hydration compartment with premium 2 liter anti-bacterial reservoir included. Drinking tube is ergonomically positioned for easy drinking; drinking valve has handy locking system that securely shuts off water flow.            * Easy access to reservoir for quick installation and removal. Small external side pockets to carry extras.      * Padded air mesh back and straps for comfort.      * Sternum strap for security.