Osprey Soft Flask

The high-flow bite valve is designed to be intuitive; simply apply light pressure with your teeth while sucking to release water. It is engineered for quick hydration on the move without needing to manually open or close a nozzle.

The wide mouth opening makes filling the flask straightforward, even at water stations or streams. It allows for a quick pour and accommodates ice cubes if you prefer your water chilled.

The flask features a collapsible design, meaning it shrinks as you consume the liquid. This prevents the water from sloshing around and allows you to pack the empty flask into a small pocket or vest compartment.

While the 500ml size is a standard volume for most hydration vests, the soft, flexible material makes it more adaptable than rigid bottles. It should fit comfortably in most dedicated chest pockets, though it is always worth checking your vest's specific pocket dimensions.

Rinse the flask thoroughly with warm water and a mild soap after each use. Because of the wide mouth, you can easily reach inside with a bottle brush to ensure it is completely clean and dry before storing it.