It will slightly tighten your fitted hats. Some people buy them to fill space for the hats that are not true to size. They are approximately 3mm thick.

Hand wash with a mild soap. Hang dry. Stankeez is made with an anti microbial material but still needs to be washed after a lot of use.

Stankeez is reusable, hand washable, and interchangeable. Fits in most hats. Stankeez is designed to fit in between the sweat brim of your hat. This allows a double protection of sweat and odors from getting on your hat.