These heavy bass earbuds are really great quality. I had my teenage son test them out, and he said that they work really well. He is rather picky with his earbuds and won’t use just any. He said that these deliver with the bass, and that is very important to him. The cords are good quality and don’t show any signs of the wires coming loose or anything, which is rare nowadays. The earbuds came with different size covers to work with any ear size. The sound is clear and crisp, without any fuzzy noises or anything. Overall, these are a great product. I received this product for free in exchange for an honest review. All opinions are my own.