ODI F-1 Vapor GRIPSODI F-1 Vapor Grips are made from our exclusive A. I. R. E. compound which infuses air into the grip reducing weight by over 30% and providing a slower rebound and response for improved comfort. They have a reinforced inner layer which supplies added durability. Ergonomic finger cutouts provide a better gripping surface and improved control in all conditions. Features Medium diameter (31. 5mm)Added Surface Pattern provides improved grip in all conditions Made in the USA | Odi | F-1 Vapor Grips 130Mm Black