TRN Memory Foam Tips Earbuds 3 Pairs S/M/L 4.5mm T400 Noise Isolating For In Ear Headphones Ear Cushions with Retail Box~~Note: "Cainiao Super Economy" and "China Post Ordinary Small Packet Plus" only have half-way tracking information. Once the parcel leaves China, there will be no tracking information. It takes 50-70 days to reach its destination. And there is a lot of risk of loss, so we do not recommend it. If you choose this type of logistics, we will not bear the risk of loss. We strongly recommend customers to choose "Aliexpress Save Shipping" and "Aliexpress Standard Shipping". These are official Aliexpress logistics, safe and efficient. TRN Premium Memory Foam In-Ear Headphones. Listen more, listen longer. Superior Isolation and Comfort. Maximum Noise Isolation. With a completely sealed ear canal, you'll experience sound isolation at its best. Memory foam earbuds offer twice the decibel reduction of silicone. With ambient noise significantly reduced, your music will truly shine. For a Soundport Width of 4.5-5mm. There are thousands of headphones, all with different Soundport widths. To ensure a secure fit, measure the Soundport to ensure it's between 4.5mm and 5mm wide. Improved Sound. Memory foam earbuds can be inserted deeper into the ear canal, blocking out ambient noise to enhance high and low frequencies, resulting in improved sound quality. Earbuds can be worn all day. Do your ears ever hurt when you take your headphones out after a long day? Those days are gone! Memory foam earbuds allow users to enjoy their favorite music all day without any discomfort. Available in 4 colors. With memory foam in-ear headphones, 1. Squish the memory foam earbuds between your fingers before inserting them. Roll the earbuds between your fingers until the foam fully compresses into the long tube. 2. Gently push the earbuds into your ear, wait a few seconds for the earbuds to return to their original shape, and completely block out all external noise. Specifications: Materials: Polyurethane foam, thermoplastic elastomer. Latex-free. Colors: Red, Black, Blue, and Gray. Dimensions: Large/Medium/Small. Package: Set of 3. Physical recognition. Real shooting shows the charm of the products.