"Once you use it, you won't want to let it go." That's the kind of saying goes, 'This versatile eco heat pack can be used all year round.' For stiff necks and shoulders during cold seasons or desk work, microwave and use it as a warm pad to comfort you. When you want to cool your body during restless summers or warm up on your body, chill it in the fridge and make it a great cooling pad. The exquisite weight of the brown rice fits your body perfectly, giving you a reassuring feeling as if you're being treated. With a strap, it stays stress-free even when you move while slinging it over your shoulder. The sophisticated two colors, "Muted Yellow" and "Greige," are highly appreciated as stylish gifts for loved ones. [Chilled before use] In summer or when you want to cool hot flashes, you can put them in a plastic bag and chill them in the refrigerator or freezer, which can also be used as a cooling pad. [Warm before use] 1. Warm up Place the brown rice hand warmer with the outer cover on a heatproof plate and heat it in the microwave. At 500–600W, the recommended duration is 1.5 to 2 minutes. When using for the first time, warm it for 30 seconds while monitoring the temperature and be careful not to overheat. 2. Temperature Check Do not use it immediately after heating; always touch it with your hands to check the temperature. If it is too hot, let it cool slightly before use. 3. Apply to the body Please apply it to areas you want to warm, such as shoulders, neck, waist, or abdomen. It comes with a string, so if you drape it over your shoulder, it's recommended for children and the elderly. After warming up your body for about 15 to 30 minutes, you will gradually loosen up and relax. The recommended usage time is about 30 to 40 minutes. * When sleeping or using the strap, be sure to remove it before sleeping.