Ready to hit the trail? The On Running 500ml Soft Flask is the perfect sidekick to keep you going. It fits like a glove in the Ultra Vest or is easy to carry by itself.

On designed it to be super practical. The lid won't leak, so you can run, jump, and climb without worrying about sticky spills in your gear. And when it’s time for a refill, the wide top makes it a breeze to fill from any tap or stream. Cleaning is just as easy. Less fuss, more adventure!

Features

• Soft flask designed to fit in the Ultra Vest
• Can fit 500ml of thirst-quenching goodness inside
• BPA and PVC free
• Leak-prevention technology so you won't waste a drop
• Wide-mouth opening so cleaning is much easier after use
• Easy-hang loop so you can store it when not out in the wild
• Easy to pour, fill and clean – what more could you need
• Dishwasher-safe so you can chuck it in and let it go
• Weight: 37g

Materials: TPU 64%, PP 23%, Silicone 10%, POM 3%.