Excellent Indoor Kart Suit Durable Cotton / Polyester Fabric The OMP Summer-K is a Budget kart suit primarily designed for indoor karting where no approval is required. Also ideal as a leisure or outdoor suit for where an overall is required. Made from a single layer durable cotton / polyester fabric. A Velcro closure waist belt and collar along with OMP branded epaulettes give the Summer-K a race suit look at an affordable price.