RSG Ear Warmers Muffs Adult Heavy Gauge Metal Underwire (Grey Shearling) Manufactured and distributed by RSG Hosiery. Heavy gauge metal underwire (not plastic) keeps them from breaking. Each color sold separately. The loop behind your head. These are not traditional earmuffs that go over the top of the head. Soft polyester fleece. "Shearling" options are faux shearling. Solid colors are fleece lined. Insulated for warmth One size fits most adults. These do not fold up.