With our new 500ml soft flask – Made by Hydrapak – you get even more world class performance out of your hydration system. Designed to maximize the ergonomics in our running vests, the low profile flask with 28mm cap and high flow bite valve shrinks as you consume your liquids reducing it’s mass and volume. Weighing a scant 28g. it is the perfect companion for all ultralight Naked products. Run with confidence knowing our flasks come with Hydrapak’s famous Beyond Lifetime Guarantee. Please note Soft Flasks cannot be returned if the safety shrink wrap has been removed.