Sparco karting shoes Omega KB-6 Red Green. Omega KB-6 uppers are made from a breathable pressed fabric and have leather inserts. The boots are equipped with a breathable inner lining and anatomic insoles. A reinforcement has been added in the ankle area and an elasticised panel has been inserted at the rear, just above the heel, to improve fit and allow the ankle to move freely when driving. The Omega KB-6 kart boots have new asymmetric rubber soles with external lateral reinforcement and belt closing with loop.