Maintain the pristine condition of your hats with our 20PCS Hat Sweat Liner for Baseball Caps Inserts. Crafted from premium felt material, these hat shaper insert provide exceptional sweat absorption and structure reinforcement. Each liner measures 26x10cm (10.24x3.94inch) and can be trimmed for a customized fit, ensuring compatibility with various hat types. Designed for both men and women, these hat shaper insert are washable, reusable, and easy to clean, making them ideal for daily use, outdoor activities, and sports. The package includes 20 liners (10 black and 10 white), offering ample replacements to keep your hats fresh and comfortable. Enhance your hat-wearing experience with these versatile and practical hat sweat protectors.