Features: 1. **Versatile Cooling & Heating**: Our Cool Gel Cap Pad can be used for both cold and hot compresses, providing refreshing relief from summer heat or soothing warmth for muscle relaxation. Perfect for any season! 2. **Easy to Use**: Simply refrigerate for cold therapy or microwave for heat therapy. Quick and convenient, its designed for hassle-free use, ensuring you get the relief you need in no time. 3. **Comfortable Fit**: Specifically designed to fit various head-mounted devices, our cap pad offers a snug and comfortable experience, making it ideal for use with baseball caps and other headgear. 4. **Durable & Safe Materials**: Made with high-quality glycerin and sodium polyacrylate, our gel pad is safe for repeated use and easy to clean, ensuring long-lasting performance and hygiene. 5. **Fatigue Relief**: Experience the ultimate in relaxation as our cap pad helps relieve fatigue and discomfort, providing a cool and soothing sensation that enhances your overall well-being. Our cool gel cap pad is carefully formulated with glycerin and sodium polyacrylate. Designed specifically for compatibility with various head-mounted devices, it is highly versatile and burden-free. The usage method is extremely convenient: When used for cold compress, put the cap pad in the refrigerator for at least 2 hours. Check the temperature array before use to avoid excessive cold. For hot compress use: Microwave heat for 20 seconds. Confirm whether the temperature is appropriate before use. If additional heat is needed, heat at a 5-second interval until you feel comfortable. Clean the surface after each use. And it is precisely designed to fit comfortably, bringing a cool and comfortable experience, which can relieve fatigue and provide a cool and comfortable experience.