Features Enter your model number to make sure this fits. Lightweight Construction - Formed from lightwieght rips stop fabric and stretch mesh construction. Adjustable shoulder strap - Contoured with a mesh back and fully adjustable to provide a highly comfortable fit. Antidote® Reservoir - One of the best on the market with a multitude of features. Adjustable Reservoir and Cargo Compression - Locks down the reservoir and pack to reduce bounce and water slosh. Stretch Cargo Pockets - Provides convenient storage and quick, easy access. Description Product Description Camelbak's most technical running pack, the UltraTM 10 was designed to endure one of the toughest trail races on earth; the Ultra Trail du Mont Blanc. The pack was designed and engineered to carry every item on the UTMB gear list: a 2 litre reservoir, room for food and extra layers, a sweat proof pocket for your smartphone and two chest pockets for additional water bottles. If it works on Mont Blanc, it can handle just about anything. Refilling on the run? Camelbak have added colour coded straps so you'll instantly know how to access your water supply, and an external fill design that lets you refill without unpacking the bag. On hot days, fill the reservoir with ice water-the mesh back panel lets it sit against your back to cool your core. Camelbak have also included overflow storage, trekking pole attachments and plenty of lash points, just in case. The custom-fit harness and dual sternum straps adjust for a close, comfortable fit, and the cargo compression lets you cinch everything down to minimize bulk. Key features of the Ultra 10 Include Adjustable harness with cargo pockets Integrated reservoir and cargo compression Sweat-proof phone pocket Trekking pole attachment Expandable cargo compartment 2 Litre Hydration The Pack Designed from the ground up to provide lightweight hydration and adjustable storage to tackle the most demanding of terrain. The main body features rip stop fabric yielding a durable and weather resistant embodiment, parred with integrated mesh throughout the Marathoner is exceptionally lightweight and comfortable to wear. The contoured shoulder straps and adjustable sternum straps create a fully adaptable and adjustable fit, that moves with the wearer rather than against. This design reduces the amount of bounce and feedback from the pack whilst the wearer transitions through various motions and activities, crating a highly comfortable fit that won't impede its wearer. Two cargo pocket at the front offer generous room to store and easil