With a wide 42mm cap and high-flow valve, the SOFT FLASK 500ml/17oz 42 makes staying hydrated faster and easier, so you can focus on the trail ahead. Shrinking as you drink to limit water bounce, the flask lets you know exactly how much you have left. Compatible with all Salomon caps featuring a 42mm opening. This soft flask is designed for efficient hydration, featuring a leak-proof design and a soft, collapsible body that reduces sloshing and makes it easy to pack. The high-flow valve ensures quick access to water without spills, perfect for running, hiking, or any outdoor activity. Its compact size fits easily into hydration vests or backpacks.