Features: Memory foam tips for WF-1000XM4 ,airdots 3Pro and secure in-ears fit; Does not interfere with charging; Offer a superior sound experience, slow rebound.. This memory foam with latest polyurethane foam,safe and non-toxic to achieve headphone upgrade. After many tests and designs, the memory foam tips noise isolation offer superior-o experience enhanced bass and good seal block out external noise. The earbuds foam tips very soft, anti-slip, body-heat activated memory foam that adapts and molds to your ear for a completely customized fit and hours of comfortable listening- Provide 24 hours comfort, suitable for long wearing and exercise. Specifications: Size: -S/-M/-L Color: Black/Gray Material: Memory Foam Fit for: WF 1000XM4 WF 1000XM3 airdots 3ProEarbuds Quantity: 1 Pair Package Includes: 1Pair x Earphone Earpads note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment