This collection of Hydration Packs has been specially designed to maintain hydration level of bikers. Products of Dirtstack feature multiple pockets for keeping papers, tools and other personal belongings for easy accessing purpose. Dual side expansion buckles of these items promote their custom fit and optimum comfort of users. YKK zippers based pockets are water proof. Reflective elements based design ensures their clear visibility even during low light conditions. Girth and height adjustment points and required storage capacity for carrying multiple clothes are some of the important aspects of these items. Hydration Packs of Raida prevents dehydration during cycling, running, hiking, motorcycling and various other outdoor activities. Product line of this brand feature detachable drinking tube, auto shut off valve to avoid leakage during removal of drinking tube and dust covering based flow bite valve. Products of this brand are BPA free and have approval of FDA and SGS as well. Offered items can be filled, cleaned and drained easily. Even the ice can be inserted into these sans any difficulty. For optimum durability, these packs have double soldering sealing. Measuring scale of these items maintains accuracy of water level.