✅Constructed by solid ABS shell and thickened foam, the ear muffs achieve NRR 32 dB (SNR 34 dB) rating, ANSI S3.19 (US) certified, and effectively reduce the damage of high decibel noise while ensuring comfy wearing ✅Ideal for lawn mowing, shooting, flight, construction, sports events, studying, factory, and woodworking, extremely suitable for operating heavy machinery or landscaping business, and for kids enjoying fireworks, monster jam. Also a good choice for the autism ✅The adjustable headband with metal prop and 360 degree rotatable ear cups fit most head sizes from kids to adults. Kindly Note: For more efficient sound isolation, the earmuffs are snug and a little tight before using. If you feel tight, we recommend putting it on a box or other objects for 1-2 days to stretch the headband ✅Soft padded headband reduces the pressure on your head for superior comfort. Meanwhile the imitation leather provides a tight sound-proof seal. The 360°rotatable ear cups with generous space inside ensure breathability and cause no pain in your ears ✅Compact folding design is for easy storage and convenient portability, fits well in most bags or backpacks, Weight: 0.6625 pounds, Manufacturer: ProCase