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. Designed to be compatible with the charging case, even larger sizes can be safely stored inside without interference. Ergonomically shaped to fit the natural contours of the human ear canal, these earplugs are comfortable for extended wear and conform to the ear with body heat, ensuring a soft fit without causing ear fatigue. Precisely molded to match the original earphone shape, they fit comfortably in the ear canal and help block external noise. Featuring a soft and breathable nano-coating, the material is gentle on the ears and suitable for long-term wear. Fit for: WF1000XM4, WF1000XM3, Airdots 3 Pro Earbuds. Note: Due to different production batches, there may be slight variations in product appearance and printed text, which do 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: Lighting reflections and differences in display screens may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm.