Feature: Lacing:Central Insole Material:EVA foam Outsole Material:Rubber Primary Upper:Synthetic Classification:Cushioning The Nike Lunarglide+2 Gray Black Men's Shoes constantly adapts to your stride to deliver just the right amount of comfort and support.Lunarlon cushioning midsole system blends plush cushioning and response. Dynamic Support provides stability for underpronators up to moderate overpronators.Gender specific flex grooves on the rubber outsole promote a naturally efficient stride.BRS 1000 rubber at heel and environmentally friendly rubber everywhere else on the outsole.A wedge of firm foam at the back of the midsole offers pronation support for those who need it.