Nathan Soft Flask with ExoSpine 14oz runfree BATTERY FOR DAYS: Up to

BATTERY FOR DAYS: Up to 15 days of battery life in smartwatch mode and up to 26 hours in GPS mode for a more complete picture of your training and recovery

and sharp turns

low-profile sports bra

Do Not Iron Decoration

but that doesn’t mean it has to be completely uncomfortable

Nathan Soft Flask with ExoSpine 14oz runfree BATTERY FOR DAYS: Up toDescription Built as the perfect compact companion for hydration vests and packs, the Soft Flask with ExoSpine 14oz is a smaller capacity soft flask designed to fit in front vest pockets or carry on its own. The classic bite valve gives you control over flow so liquids go where you want them, not down your chest. Fully compatible with all Nathan hydration vests, this is the go to flask for marathon, trail, and ultra runners who need a reliable add on.