Instant-use earplugs in a No Roll-Down Design allows users to just grip the stem and insert the tip into the ear canal. No need to roll foam before fitting. The cylindrical shape of the Pistonz ear plug is designed to fit and seal most size ear canals. Made of specially formulated foam, so soft and comfortable that the Pistonz earplugs can be worn all day. Stem is stiff enough to insert yet is designed to flex sideways if impacted during wear. Comfortable and easty to use earplugs have a NRR of 29dB. OFFICALLY LICENSED HEARING PROTECTION OF NASCAR. Uncorded, 100 pairs per box.