Feature: 1. Noise Insulation: High sealing cup and unique double shell hard hat earmuff offers excellent noise reduction and sound insulation. 2. Ear : helmet earmuff can firmly attach to a hard hat not included, which can provide hearing . 3. Easy Assemble: Helmet attachable earmuff is easy to install and compatible with most helmets not included, bringing you much convenient. 4. Widely Use: Hard hat attachment earmuff especially suitable for construction and manufacturing jobs, can be used on automotive, woodworking, heavy engineering, mining, etc. 5. Excellent PVC: Hard hat attachment ear muffs made of PVC material, high strength, and impact resistant, which is suitable for rugged environments. Specification: Item Type: Helmet Ear Muffs Material: PVC Scope of Application: Construction, manufacturing, maintenance, automotive, woodworking, heavy engineering, mining and operating machinery to protect hearing, especially for construction and manufacturing jobs. Package List: 1 x Pair of Helmet Ear Muffs