This beige Pinnacle FeatherLite Hydration Vest from Nathan is an ultra-lightweight and breathable, minimalist vest with just the right amount of hydration and storage, ideal for road and trail training. This ultra lightweight vest features power stretch mesh and stretch woven fabric for maximum breathability and comfort. Easy to use and access soft flasks in front pockets. Just the right amount of pockets, 4 front and 1 main zippered back pocket that can hold a jacket, hat and other valuables. Specifications: Unisex, compression-fitted vest designed with a longer back for the ultimate fit and function Shoulders and upper back are made of power mesh for maximum breathability and ultra-light adaptable comfort Back pocket with 1.5L capacity and right entry zipper closure designed to store jacket, essentials and valuables. 4 Front pockets fit bottles and flasks up to 20oz Front sternum and side adjustment straps are designed for a bounce-free run fit Unisex size that fits to adapt by two sizes: S-M Storage capacity: 91.5 cu in / 1.5L Weight w/o flask: 4.4oz / 125.4g Weight with flask: 5.5oz / 156.6g