Used to cover your wear out headband or protect it from scratch, No tool needed. Fits over the original headband and zip up in place. Don't need to remove the original headband. Cover Compatible Headphones: Sony WH-1000XM4, WH-1000XM3、WH-1000XM2 Package Includes: - 1 x Headphone Headband Cover Note: - Headphone Headband only, Headphone is not included. (Colors shown in pictures may slightly differ from actual product due to lighting and color settings.)