Occunomix MiraCool 892 Liner and Neck Shade is made of super absorbent double layered, double napped (both sides) cotton terry plus a layer of foam around the rim catches profuse perspiration. Installs instantly with four hook and loop straps. A small elastic strip in the rim enhances fit. Terry Toppers™ Summer Liners can be worn without a hard hat!! Wear inside-out as a cool cotton, lightweight, absorbent cap. Blocks sun and keeps perspiration off face and head. Machine washable.