The JacksonĀ® Safety H70 Onyx Ear Muffs headband style design features an ultra-soft cushioning headband for extended use with ball-and-socket pivoting ear cups for optimum pressure distribution and adjusts to most head shapes and sizes. Promoting safety & ensuring security, the dielectric insulation protects users from electric shocks and shorts, the durable thermoplastic material retains shape and pressure for consistent noise reduction. These ear muffs have a lightweight design, with a noise reduction rating (NRR) of 23 dB to suit low noise environments, such as lawn mowers, industrial work, traffic noise etc.