UltrAspire UltraFlask 550 Hybrid Bottle Men's Trail Shoes New knit structure for targeted

New knit structure for targeted support

This fast-paced runner deftly merges performance with comfort

PWRRUN foam midsole provides a softer stack of cushioning for your most comfortable run yet

From the minute you lace up

water-protective softshell fabric inside palm

UltrAspire UltraFlask 550 Hybrid Bottle Men's Trail Shoes New knit structure for targetedUltrAspire introduces yet another milestone in hydration history! All the benefits of the sport bottle without the downsides and all the benefits of a soft flask without the usual problems such as taste and staining from carbohydrate drinks. The UltraFlask 550 Hybrid Bottle is a cross between a hard bottle and a soft flask. This bottle has a body shape that conforms to the place its kept for the ultimate comfort, access, carriage and squeeze ability.