【Excellent Breathability & Doesn't Peel Off Easily】Ultra-thin at only 1mm thick, these can be applied to the inside of hats, collars, and cuffs to prevent sweat stains and odors all day long without worrying about sweat or stuffiness. They are firmly secured with adhesive and use an adhesive that is easy to remove after use and won't damage clothing. 【Non-Staining Structure】Absorbent mesh layer: Quickly absorbs sweat. High-polymer absorbent layer: Sufficiently retains sweat. PE waterproof layer: Prevents sweat from soaking into clothing. With excellent absorbency, they instantly absorb sweat and quickly catch it. Fine edge pressing prevents the shape from collapsing during use. 【Disposable & Reliable Absorbency】Hygienic disposable type, easy to peel off. Prevents sweat from escaping and protects forehead makeup, suppresses dirt and odors on the edges of hats, and can also be attached to collars without worrying about sweat stains. Keeps you feeling refreshed even in the hot summer, quickly absorbs sweat, and prevents sweat from getting into your eyes. 【Achieves a Soft Feel】Made of lightweight and soft non-woven fabric, it feels comfortable and is lightweight and breathable. Contains silver ions to maintain a clean condition even after long periods of wear. Compatible with various hats such as baseball caps, sun hats, engineer helmets, and tennis caps. 【Wide Range of Uses & Plenty of Quantity】Hat sweat-absorbing sheets (50 sheets) that can be used for a long time, perfect for collars of clothes, hats, and all structured hats for men, women, and children, and can also be applied to sports bras, etc.