With a thermomoulded bottom, wide 42mm cap and high-flow valve, the SOFT FLASK 500ml/17oz SPEED 42 makes drinking, refilling and storage even faster and easier, so you can stay focused on the trail ahead. Shrinking as you drink to limit water bounce, the flask lets you know exactly how much water you have left. Compatible with all Salomon caps featuring a 42mm opening (purchased from Spring 2020 onwards). Super quick use: With a thermomoulded bottom, wide 42mm cap and high-flow valve, this 500ml soft flask is easy to refill and even easier to slip back in your pocket. Comfort: The soft, flexible flask shapes to fit your pocket for extra comfort and shrinks as you drink to minimize water bounce.High-flow valve: The intuitive high-flow valve makes drinking easier, so you can stay hydrated however fast you’re running or tired you are.Molded bottom, Easier to introduce into the pocketLarge 42mm opening100% BPA & PVC freeHigh-flow valveTPU & RF welded seamsWide working temperature rangePFC-free