External input via patch cable from any external source with a 3

Doctor recommended for swimmers with ear tubes or eardrum perforations

Unshakeable fit: Ear-conforming memory foam means all-day comfort – and no more chasing after an earbud that fell out

Dangerous sounds are limited by a unique clipping technology that reduces the noise level by 50%

Hellberg Electronic Earmuff Hygiene Kits Size:Secure Electronic External input via patch cableReplacement pads and foam for Hellberg Earmuffs Hygiene Kits are used to maintain proper earmuff performance Kits contain new ear cushions and foam liner inserts which can be quickly replaced in a few easy steps You should replace your hygiene kit every six months to maintain maximum protection