Whether you are running one mile or a few, the fully-adjustable hand strap with chafe-free thumb hole and TPE grip will keep your fingers and hands relaxed while you get to focus on the road ahead. 12oz / 355 mL ergonomic Flask with TPE grip to prevent sweating Push-Pull Blast Valve cap allows for quick bursts if hydration Fully-adjustable hand strap with chafe-free thumb hole Expandable zippered pocket for nutrition, keys, and small essentials 70% Nylon, 30% Polyester Storage Capacity: 8.5 cu in/0.14 Liters Weight With Bottle: 3.42 oz/97 g