The Escalante was such a hit that it's hard to imagine it getting better, but believe it or not, it did! The 1.5 version features an updated knit with 360 degree reflectivity, increased breathability, tongue stay, new color patterns and sleeker heel cup. This new upper coupled with that same powerfully plush feeling of Altra EGO(TM) under foot creates the perfect combo of high performance and comfort. FOOTSHAPE(TM) TOE BOX Altra's FootShape(TM) Toe Box toe box allows the toes to relax and spread out naturally and the big toe to remain in a straight position for maximum stability and power. ZERO DROP(TM) PLATFORM Every Altra shoe features a Zero Drop(TM) Platform that places the heel and forefoot the same distance from the ground for natural alignment and a low-impact landing. ALTRA EGO(TM) Dual-Nature midsole compound with a responsive, yet soft feel for increased energy return. FOOTPOD(TM) TECHNOLOGY An outsole technology that actually maps the bones and tendons of your foot to help it bend and move naturally. Specifications Ideal Uses: Road Running, Fitness / Cross-Training, Walking Weight: 7.9 oz / 224 g Insole: 6 mm Contour Footbed Platform: Fully Cushioned Zero Drop(TM) platform and FootShape(TM) Toebox Stack Height: 24 mm Midsole: Altra EGO(TM) Outsole: Footpod(TM) Upper: Engineered Knit Other Features: Altra EGO, FootPod, FootShape