3M PELTOR X4A Earmuffs, Yellow Green, Domestic Genuine Product Purchased from Amazon for around 5,000 yen. I had two, one for school and one for home, but I no longer need them. I'd like to offer the one in good condition to someone who can use it. They weren't too tight and were very easy to use. There are no noticeable scratches or stains. They were stored at home in a soft cloth bag. No box included. NRR: 27dB Hearing protection in noisy workplaces When you want to concentrate on studying or reading Reducing stressful everyday noise Country of Origin: Poland Weight: 234g, Cup thickness: 46mm, Band extension width: 35mm (each side), Body dimensions: Width 130mm x Height 170mm Materials: Headband: Stainless steel, thermoplastic resin, polyester, polypropylene, polyacetal resin; Cups: ABS resin, thermoplastic resin; Inserts: Polyurethane; Ear cushions: Polyurethane/vinyl chloride/ABS resin ANSI (American National Standards Institute) certified