The first-ever, double-wall insulated Flask with Fire & Ice technology means you've found your new favorite Flask.

• Double-walled construction keeps fluid cooler 20% longer than other insulated bottles
• Integrated reflective fabric offers 360-degree reflectivity for visibility in low-light conditions
• Race Cap offers quick bursts of fluid
• Fits all 10 oz NATHAN hydration belt SpeedFit holsters and the QuickShot Plus insulated handheld