Product Description .aplus-v2 { display: block; margin-left: auto; margin-right: auto; } .aplus-v2 .aplus-3p-fixed-width { width: 970px; } .aplus-v2 .aplus-3p-fixed-width.aplus-module-wrapper { margin-left: auto; margin-right: auto; } if(P) { P.when("a-expander", "ready").execute(function (expander) { expander.initializeExpanders(); }); } Runner's World "Best Debut" 2016 Award Winner, the Ultrafly is perfect for runners seeking cushioning and light support. It features strategically placed printed overlays and molded foam heel stays to secure the foot over a 28/23mm, 5mm drop platform. The 3-piece EVA midsole provides light guidance and feedback through the gait cycle. We recommend sizing up half a size. Features: Strategically placed printed overlays for increased security and reduced weight. Molded foam heel stays for added security The 3-piece EVA midsole is engineered for runners seeking cushioning and light support, and provides light guidance and feedback through the gait cycle. Usage Recommendation: Road running Topo recommend sizing up half a size. Specs: // 4.5 MM RUBBER OUTSOLE // 18.5 MM EVA (HEEL) / 13.5 MM EVA (BALL) MIDSOLE // 5 MM FOOTBED // 28 MM X 23 MM TOTAL STACK HEIGHT/ 5 MM DROP // WEIGHT: 7.9 OZ. (SIZE 7)