These Peltor Optime 101 over-the-head foldable are one-size-fits-most and come in black/green/silver. They have cushions, cups, and bands made of foam/polyurethane/polyvinyl chloride, ABS, and acetal/stainless steel respectively. The noise reduction rating is 27 decibels and meets the CSA Class AL standard with up to 101 decibels of hearing protection and there are 10 earmuffs per case.