Upgraded Noise Reduction Effect: Offers a SNR 36dB / NRR 32dB rating noise reduction; ANSI S3.19 (US) certified Upgraded Metal Headband: Built to withstand super intense stretch, providing an extraordinary durability Comfortable to Wear: Ergonomically designed headband reduces the pressure on your head; Thickened cushion foam provides a tight sound-proof seal around the ears Suits Various Sizes: Retractable stainless steel and 361° rotatable ear cups with comfortable foam can be adjusted to fit all sizes from kids to adults Warm Tips: These “Upgraded series” ear defenders are designed for noises of medium and high intensity, such as noises caused by construction site, shooting, hunting, airport, woodworking projects, lawn care and heavy machinery. For noises of low – medium intensity, we recommend our “ Ultra comfort series” or “ Basic series”, Manufacturer: ProCase