It's cleaning day, make sure you start with your hat with the Jason Markk Hat Care Set. Designed to keep your favorite accessory clean, this set includes a fragrance-free solution and the signature soft-bristled Premium Brush for a complete clean-up. Get sweat stains out of your hat and keep your style on point with the Jason Markk Hat Care Set. RTUE Hat Cleaner requires no water. Soft hog’s hair bristles and walnut wood handle allow easy cleaning with the brush. Weight: 4 oz.