the multi-foam plugs are made of polyurethane foam, which is gentle on the ear and, thanks to its softness and flexibility, adapts perfectly to the shape of the ear canal. 30 seconds is enough for the earplugs to properly fill the ear canal. Haspro Multi disposable earplugs have an attenuation level of 38dB, so they can be used to reduce noise at work, in the office or during studies where concentration is required. Each pair is individually wrapped so we can hygienically remove them from the box or give them to someone.