energy return and durability for daily training

Thumbholes give optional warmth around your hands

while a secure heel and midfoot create the locked-in fit needed for the trail

Features a fashionable print for added style

The Synergy has Heel and Forefoot Hydroflow cushioning

Ultimate Direction Body Bottle II 500 S Category_Training energy return and durability forThe Body Bottle is the easiest and lightest way to carry your fluids Wide design with wide fill 42mm cap lets you easily fill with ice and drink mixes Shrinks as you drink to eliminate sloshing and collapses fully to a tiny size when empty Made with ultra durable, abrasion resistant TPU material and has Hydrapak's Beyound Lifetime Guarantee 100% BPA and PVC free 500ml