Ergon IP3 Solestar InsolesThough the use of lightweight materials like fiber reinforced plastic core, the Ergon IP3 Solestar Insoles allow for an efficient and comfortable cycling motion. They're compatible with just about any cycling or athletic shoe allowing you to use them with your your shoes of choice.FeaturesRigid fibre enforced plastic coreFits any cyling and athletic shoeHigh walk flex combined with increased stability on the bikeShoe Size (US)36/37 (4.5-5.5)38/39 (6-7)40-41 (7.5-8.5)42-43 (9-10)44-45 10.5-11.5)46/47 (12-13) | Ergon Ip3 Solestar Insoles Size 38-39 in Black