Our best-in-class soft flask with integrated hand straps creates ideal running efficiency! The grip-free, design features a patented ExoSpine™ to maximize comfort as the water level decreases.
- 12 oz /355 mL BPA-FREE soft flask with bite valve keeps liquids from escaping.
- The rigid ExoSpine™ creates superior hand feel and support for the soft flask
- Ergo-designed hand-strap provides grip-free comfort, and maximizes running efficiency
- Hand strap is removable, allowing soft flask to be used in most Nathan hydration vest pockets.
- Removable neoprene sleeve offers insulation and a tactile, sweat-free grip surface.
- Expandable stash pocket for nutrition and other small items.
- Storage Capacity: 3 cu in/0.05 Liters
- Weight With Soft Flasks: 2.6 oz/73 g (with bottle)