• MILITARY GRADE TOUGHNESS: Ultra-durable, abrasion resistant for superior durability and elasticity – expands to 8x size without bursting
• HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing.
• KEEP YOUR WATER COOLER: The HydraFusion Drink Tube and Dust Cover insulates in hot weather and protects in tough conditions
• EASY TO CLEAN: 100% BPA free, the water reservoir is fully reversible and top-rack dishwasher safe
• PERFECT FOR AID STATIONS: UltraFlasks are equipped with our SpeedFill Cap designed for quick and easy refilling at aid stations. A side tab pops open the cap in one motion and snaps shut with a click.