Stay clean from head to toe. The Jason Markk Hat Care Kit includes an all-new, fragrance-free solution specifically formulated to gently, yet effectively clean hat materials, along with our signature soft-bristled Premium Brush. This gentle new formula is safe to use on cotton, wool, felt, corduroy, polyester and more. Designed for quick and easy care, our Ready-To-Use Hat Cleaner dispenses the perfect ratio of solution to water for the most effective clean every single time. Jason Markk Hat Care Kit