The Dynafit Flask 350 ml is a 34 gram collapsible soft flask with a high flow bite valve. A soft flask does what a bottle cannot: it shrinks as you drink, so it stops sloshing and stops bouncing in a vest pocket.

• Volume and weight: 350 ml, 34 g, transparent so you can see the level.
• Collapses as it empties: no slosh, no bounce, and it packs flat when finished.
• High flow soft bite valve: drink without breaking stride.
• Wide opening: for filling and for dropping in tablets.
• BPA and PVC free
• Compatibility: Pairs with the Dynafit Trail Running Belt and the brand's running vests.