1. The noise reduction and sound insulation earplugs are made of elastic material, providing a comfortable fit and enhancing the seal 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. Comfortable for extended wear, adapts to the ear with body heat, and helps prevent ear fatigue. 4. Molds to the ear for a secure fit, effectively isolating external noise. 5. Features a soft, breathable nano coating; the material is gentle on the ears and comfortable for long-term use. Compatible with: WF 1000XM4, WF 1000XM3, Airdots 3Pro 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 tips for in-ear headphones Note: Only the items listed above are included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.