Prevent contamination and help keep your work environment clean with these hairnets from Hairtite. The breathable polypropylene (PP) material promotes good air circulation, making them comfortable to wear. To prevent slipping, the hairnets come with a front knot to ensure a secure fit around your head. The elastic rubber bands have a nylon covering, so they won't chafe your skin. These hairnets can stretch up to 55cm to fit over different head shapes and sizes.