Designed for the belt. Made to stay closed.
A 500 ml soft flask with a locking cap that keeps water securely inside while running
Specifically designed for use with the Trail Run Belt, this 500 ml soft flask lets you carry water safely and comfortably, without adding unnecessary bulk. Its locking cap helps prevent accidental leaks while running or when stored in the belt. Unlock it to drink, then lock it again to keep the water securely inside