Jason Markk Ready-To-Use Hat Cleaner is a fragrance-free solution specifically formulated to gently, yet effectively clean hat materials such as cotton, wool, felt, corduroy, polyester and more. The Premium Cleaning Brush features soft hog bristles that are excellent for cleaning delicate hat materials. The kit includes: 1 x 4 oz Premium Ready-To-Use Hat Cleaner and 1 x Premium Cleaning Brush (AKA Delicates Cleaning Brush).