Impact Racing 40010510 Shoe - Alpha SFI3.3/5, Size 10.5, Blk. The Alpha is Impact’s premier mid-top racing shoe featuring a distinctive grooved racing sole for precise pedal control and maximum comfort. Manufactured from an ultra-plush aramid interior and durable yet soft and easy-to-clean exterior, the Alpha is engineered to withstand direct flame and heat transfer. Designed using lightweight materials, the form-fitting anatomical construction of the Impact Alpha footwear offers exceptional pedal response and maximum range of motion. Manufacturer’s certified to the SFI 3.3/5 specification. Colors: Black Only