Designed to transfer power to the pedals as efficiently as possible. The upper is a Polyurethane film coated synthetic mesh for weatherproofing with snug lace and Velcro closures.Lace closure with hook-and-loop top strapSynthetic weather-resistant micro-perforated upperPerforated EVA tongue with mesh overlayStealth C4 rubber outsole for unbeatable gripDurable lightweight EVA midsoleClipless styleStiff carbon-infused nylon shankRegular fitTextile lining