Nathan Pinnacle 18 oz Flask auclair It creates a reinforced feel

It creates a reinforced feel during volleys or when you're dropping back to track down deep lob shots

Mesh back and side panels improve breathability

the Zinal 3 is the tool for the job

One Size Fits Most

Nathan Pinnacle 18 oz Flask auclair It creates a reinforced feelBuilt for runners who want premium soft flask hydration in a larger capacity, the Pinnacle Soft Flask 18oz Handheld features our advanced ExoShot flask technology in an updated carrier with a grip free mesh strap that contours to your hand. Ideal for marathon training, trail runs, hikes, and longer efforts where extended hydration and comfort both matter. The 3D soft flask collapses as you hydrate to minimize size, and a wrap around pocket secures