14 oz /414 mL BPA-FREE Nathan x Hydrapak soft flask with bite valve. Soft flask can be easily removed from sleeve. Proprietary soft flask interior rigid ExoSpine creates superior hand feel and support. Ergonomically-designed hand strap for grip-free comfort Breathable wicking mesh strap for maximum comfort Small expandable stash pockets for gels, keys and other small essentials. Weight With Soft Flasks: 2.54oz/72g. Storage Capacity: 15.25 cu in/0.25 Liters The Pinnacle softflask handheld features Nathan's advanced Exo Shot flask technology in an updated carrier and grip-free strap for unmatched comfort. It boasts an expandable pocket for keys and essentials, ideal for marathons, trail runs, hikes, climbs, and more. GRIP FREE: Lightweight, ergonomic mesh strap contours to your hand for a comfortable, no-grip fit. EXPANDABLE HYDRATION: The 3-D soft flask bottom optimizes storage and minimizes size, collapsing as you hydrate for easy handling and storage. QUICK STORAGE: The small, wrap-around pocket with an elastic opening easily stores essentials like keys or nutrition.