The headphones with noise cancellation up to 38 dB SNR are able to block loud noises for hearing protection, eliminate distractions during sleep and promote concentration during studies. Lightweight high-density soft foam earplugs made of non-toxic PU material, gently expanding in the ear canal. This allows your earplugs to breathe freely for sleeping without feeling bloated for a long time.The package comes with 60 pairs of reusable earbuds, enough for the whole family to use and replace. The ear cups should be kept clean. When the earbuds are dirty, do not reuse them. Headphone set with a compact aluminum carrying case that is convenient to carry and store anywhere, whether as a key ring or right in your pocket, your headphones are always safe and The earplugs in foam are suitable for sleeping, studying, working, concerts, sporting events, fireworks, home improvement or other noisy activities Note: Data are all measured manually, please allow for an error of 1-3cm. Due to differences in light and display, there may be a certain color difference, which is subject to the actual object received.