Featuring the same great hand-feel, this slosh reducing, super-efficient handheld now features insulated hydration to keep runners cooler, longer.
18oz / 535 mL BPA-FREE Insulated Soft Flask with bite valve
Insulated properties keep fluids cooler 38% longer than non-insulated soft flasks
The rigid ExoSpine™ for superior hand feel and support for the soft flask
Ergo-designed hand strap provides grip-free comfort, and maximizes running efficiency
Soft flask can be easily removed from sleeve, and used in NATHAN hydration vest pockets