GoLite Men's Amp Lite Running Sneaker 100% Synthetic Synthetic sole BareTech technology provides true 'barefoot' construction where the heel and ball of foot are on the same plane. Enjoy the benefits of barefoot running or hiking with the protection of high performance footwear Internal lacing system prevents foot from sliding while offering a secure fit Antimicrobial PreciseFit footbed allows for a customized width to adjust to you're foot for a much better fit; provides an instant width adjustment, from B to D in women's sizing, C-E in men's Abrasion resistant toe and heel for lightweight protection in critical areas Soft Against the Ground' dual density EVA midsole cushions the foot with minimal weight