Endorphin Speed 4 Shoe Size:10.5 A Zoom Air unit in

A Zoom Air unit in the forefoot offers responsive cushioning

like lunging

but with a built-in metatarsal pad to treat metatarsalgia

Cushioned comfort & secure grip

A smaller frame built specifically to accommodate those with tiny noggins

Endorphin Speed 4 Shoe Size:10.5 A Zoom Air unit inWe're all seeking relationships that go the distance. The Endorphin Speed 4 running shoe is here to fill the role. Designed as a race day shoe, it's quickly proven itself much more, equally capable during long, moderate training sessions and sprints to the finish. Thanks to the "just right" combination of winged nylon plate, SPEEDROLL technology and PWWRUN PB foam, this cushioned running shoe provides the perfect balance of support, rebound and