Be prepared for anything and keep all of your essentials at hand with the stout Portage Hydration Pack. This bag is the ultimate hydration pack for long days on the bike. With our largest storage capacity, it has room for all your essentials, and then some. So you'll have everything you need for all-day epics. A dedicated tool storage pocket will have you fixing trail bike mechanicals with pit-crew-like speed. And the array of accessory pockets will help you navigate the bag with ease. For climbs that lead to aggressive downhill runs, we incorporated a strap to store your full face lid so that you can enjoy the downtime to its fullest. EVA molded back panel with airflow channel allows air to circulate and regulate moisture Hydrapak 3 Liter reservoir with slide top large opening for easy filling / cleaning Large main storage compartment to pack essentials for longer rides Separate tool storage compartment Roll out cross-country helmet holder Fleece lined sunglass/media pocket Cinch down straps allow secure storage of full face helmet Waist belt with pockets for quick access 45 angle Bite Surge Valve High flow with a twist shut off