Fresh Foam midsole cushioning is precision engineered to deliver an ultra-cushioned, lightweight ride Breathable textile/mesh upper Bootie upper construction hugs your foot for a snug, supportive fit NDurance rubber outsole technology provides superior durability in high-wear areas to help get more out of the shoes Ultra Heel design hugs the back of the foot for a snug, supportive fit 8 mm drop; due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate Lace-up closure for a secure fit