Features: Memory foam tips for WF-1000XM4, airdots 3Pro, and secure in-ear fit. Does not interfere with charging. Offers a superior sound experience with slow rebound. Made with latest polyurethane foam, safe and non-toxic, for headphone upgrade. After extensive testing and design, these memory foam tips provide excellent noise isolation, enhanced bass, and a secure seal to block out external noise. The earbud foam tips are very soft, anti-slip, and feature body-heat activated memory foam that adapts and molds to your ear for a customized fit and long-lasting comfort. Provides all-day comfort, suitable for extended wear and exercise. Specifications: Size: -S/-M/-L Color: Black/Gray Material: Memory Foam Fit for: WF-1000XM4, WF-1000XM3, airdots 3Pro Quantity: 1 Pair Package Includes: 1 Pair x Earphone Earpads Note: Due to lighting effects and shooting angles, there may be slight variations in product appearance. Please allow 0–1 cm error due to manual measurement.