Esto es un detalle que no he encontrado en ningún otro auricular. The grip stays in longer, I can use it 3/4 hours without pushing them in. Its a shame the way these shoes are being constructed, waste of good materials. Another trip to the store. The sponge just grows back as soon as released. Using for embroidery and will be perfect! its been a great way to clear up desk space so I have more room to move and do work at my L shaped desk. so I purchased this kit with little thought. I wanted them to be more low waist. Those are the only positive things I can say about these earbuds and dont outweigh the negatives.