About this item Our foam ear plugs made of high quality PU material, which greatly reduce. Each set of earplugs comes with a compact aluminum key box, which can be conveniently carried and stored anywhere. The earplugs good noise isolation, slow bounce time, soft and comfortable, which ensure all-day comfort and protection in a variety of noisy environments. Eliminate distractions during sleep and promote concentration during study. Ideal for studying, sleeping, flying, concerts. Suitable for most ear canals Fully meet your needs. They are reusable and provide long-term protection. › See more product details