Description
Built for runners who want insulated hydration in their vest, the Insulated Soft Flask with ExoSpine™ 18oz is a large-capacity insulated soft flask designed to keep fluids cool over long efforts. Fits in front hydration vest pockets or in back storage for extra capacity on hot-weather runs and ultras.
The classic bite valve gives you control over flow, and it’s fully compatible with all Nathan hydration vests.
Specs & Features
- Insulated properties keep fluids cooler 38% longer than non-insulated soft flasks
- Flask features Nathan’s ExoSpine™ for structure and stability
- Bite valve features high flow domed post and blaster compression system that control the water distribution when you use it
- Max Fill design with wide flange and 3D bottom shape for more volume in shorter dimension
- Flexible design shrinks as you drink reducing the movement and easily packs away when empty
- Works great with all NATHAN® hydration vests, packs, and wide compression belts
- Capacity: 18oz/532mL
CLASSIC DESIGN
Our timeless bite valve helps liquids from escaping so you can keep yourself hydrated no matter how far you go.
SIMPLY COMPATIBLE
Your 18oz Soft Flask with ExoSpine™ is perfectly compatible with all NATHAN® hydration vests.
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