Designed To Go The Distance. Bring your next ultra to the next level with a lightweight design specific for ultra running, featuring waterproof pockets and efficient details dedicated to long miles. The Ultra Vest uses the latest in fully customizable vest-fit technology with the ultra-durable Comfort Cinch 3.0 and protective mesh panels that prevent chafing over many miles. A roomier cut in the back and spacious arm holes provide a wider, taller fit for larger frames than our vesta version. Features: Includes 2 Body Bottle III water bottles Comfort Cinch has been upgraded with High Molecular Weight Polyethelyne cord for extra strength and air mesh panel to prevent chaffing Zippered water resistant phone pocket at front chest. Shape has been upgraded to wrap completely around the body for a more secure vest-like fit. Comes with 4 hooks and bugee loops to attach trekking poles. These loops can be attached at the front or back of the vest for customizable trekking pole carry options. Large rear compartment to accommodate up to a 2.0L reservoir Front buckle sternum straps with T-hook adjustments Zippered rear lat pockets are accessible while the vest is being worn. Stretch mesh back panel and bungee system to accommodate smaller items. Waterproof main pocket with zippered clamshell opening. One waterproof and one water resistant shoulder stash pocket for pills and other small items. Specifications: Weight (without bottles): 230 g (8.11 oz) Volume: 10.3 L (629 in3) Materials: 100% silicone coated nylon 82% nylon 12% spandex Ultimate Direction Men's Running Ultra Vest 6.0