Women's Saucony Endorphin Trail Shoes The Saucony Endorphin Trail brings revolutionary road racing technology to the trails while providing you with a unique running experience on any terrain. FORMFIT upper The upper of the Saucony Endorphin trail shoe is made from the revolutionary FORMFIT technology, developed by Saucony. This breathable mesh upper allows heat and steam to escape through its microperforations, while allowing fresh air to circulate for a pleasant feeling of freshness and tightness. This mesh upper offers optimal support, wrapping your feet in 3D comfort for a custom fit and secure fit that will keep you in control. This increased stability will help you approach any trail with confidence, while protecting you from dirt and debris as well as rough terrain you may encounter while running the trail with its quick-release trail tab. A traditional lacing system also works by complementing FORMFIT technology that locks the foot firmly, while a D-shaped ring incorporated into the tab allows the possibility of wearing a leg leg when you deem it necessary. PWRRUN PB foam midsole and SPEEDROLL Rocker technology. Enjoy incredible rebound with a thick layer of PWRRUN PB ultralight cushioning. Reducing the shock and tension your feet experience when impacting, the midsole dampens the violence of shocks inflicted on your feet, minimizing the risk of injury. The midsole offers a dynamic rebound damping system, using the strength of your last stride to propel you to the next. Optimizing its energy return as well as your fatigue rate, you will be able to