The headphone Covers can be machine washed. Using the product can effectively Keep warm, sweat, effectively prolong the life of the headset unit. This product is compatible with AKG, Audio Technica, Beats, Bose, EDIFIER, JBL, Monster, Plantronics, Skullcandy, SONY, Sennheiser, Shure. See the full list of headphones in the product description. Product Dimensions: Diameter 4.33'-6.29' inches (11-16cm) Package Contents: Earphone Covers x 2 pairs.