Endorphin Trainer Shoe Size:8.5 2-liter bladder pocket has internal

2-liter bladder pocket has internal routing for a hose

Shock absorbing gel evenly distributes pressure and helps alleviate pain

The top's knit structure forms the iconic Nike chevron at the front

Side pockets with seamless entry let you keep your essentials close

We made them with a shallower rise and limited give so you can run fast and free

Endorphin Trainer Shoe Size:8.5 2-liter bladder pocket has internalThe Endorphin franchise expands with a high tech training powerhouse. Built for runners who demand both speed and durability, the Endorphin Trainer running shoe brings race day innovation to everyday training. At its core, a top layer of IncrediRUN superfoamour lightest, most responsive midsolepairs with a durable bottom PWRRUN layer to create an ultra stable, energy efficient platform. A length carbon fiber plate, tuned specifically for training,