Breathable mesh uppers provide the classic Pegasus fit and feel, but with wider toe boxes for more room to splay; redesigned seaming on the uppers provides a better fit Curved collars help reduce irritation to the Achilles tendon; internal heel counters provide a secure rear foot fit Plusher tongues help cushion the tops of your feet Midfoot webbing tightens around your foot when you lace up, letting you customize your snugness; extra eyelets lock down your fit Zoom Air units in the forefoot provide low-profile, responsive cushioning; this model is softer than prior models, with pressure set at 15 pounds per square inch Nike React foam midsoles are lightweight, springy and durable Segmented rubber crash rails on the lateral outsoles act as a cushioning device at contact for soft, smooth transitions; crash rails feature cut-in grooves to enhance grip Best Use Running Running Shoe Support Neutral Running Shoe Cushioning Maximum Cushion Heel-to-Toe Drop (mm) 10 Heel Stack Height (mm) 24 Forefoot Stack Height (mm) 14 Weight (Pair) 1 lb. 0.6 oz.