Featuring the same great hand-feel, this slosh reducing, super-efficient handheld now features insulated hydration to keep runners cooler, longer.

Product Highlights: 

• 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
• Breathable wicking mesh under hand position provides superior grip
• Expandable stash pocket for small items or nutrition

Product Details

• Storage Capacity: 8.5 cu in/0.14 Liters
• Weight With Bottle: 3.2 oz/91 g