Stay hydrated for miles on end with this 18-ounce version of Nathan's slosh-free, ultra-efficient and super-comfortable soft flask handheld.

Product Highlights 

• 18oz / 535 mL BPA-FREE Insulated Soft Flask with bite valve
• 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
• Breathable wicking mesh under hand position provides superior grip
• Small stash pockets for gels or a key

Product Details

• Storage Capacity: 8.5 cu in/0.14 Liters
• Weight With Bottle: 2.14 oz/60 g