| RefrigiWear Knit Headband | Multicolor | Ragg Wool/Acrylic. RefrigiWear Headwear | Great protection against the cold for your ears, which are extra vulnerable to low temperatures. Fits over or under hard hats for the best protection. Double-layer acrylic knit Fits over or under hard hat Wide band for extra coverage RefrigiWear Knit Headband | Multicolor | Ragg Wool/Acrylic... - RefrigiWear Knit Headband | Multicolor | Ragg Wool/Acrylic. |