1. The noise reduction and sound insulation earplugs are made of elastic material, providing a comfortable fit and improved adhesion within the ear canal for a secure and snug wearing experience. 2. Designed to not interfere with the charging case, even larger sizes can be safely stored inside. 3. Ergonomic design conforms to the natural shape of the human ear canal. Body heat-activated material ensures a soft, comfortable fit without causing ear fatigue. 4. Precisely molded to match the original earphone shape for a secure fit and effective sound isolation. 5. Nano-coated surface is soft and breathable, allowing for extended wear without discomfort. Fit for: WF 1000XM4, WF 1000XM3, Airdots 3 Pro Earbuds Note: Product appearance and printed text may vary slightly between batches, but this does not affect functionality. Color: Black Material: Sponge Size: M Package Contents: 3 pairs × sponge earphone covers for in-ear headphones Only the above package content is included; other items are not part of this package. Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowance: ±1-3 cm.