Special gel provides a soft feel Wont harden even when frozen or heated. It can be used repeatedly and economical. Comes with a dedicated cover. ★ Cool (Cool: When your breasts are painful due to pain) When your breasts feel too tension, use a cool damp cloth to reduce the amount of secretion of breast milk. It can also be used to reduce mastitis and so on. Wear it on your breast or wear it in your bra. Can also be used when the baby is fever, toothache and other hot cooling conditions, eye fatigue and headaches. ★ Warming (Hot: When you want to improve blood circulation); If your waist or shoulders get cold or pain, use a warm dampening cloth to improve blood circulation. Can also be used for lower back pain or cold, promote blood circulation on stiff shoulders, joint pain, etc. Set Contents: Main unit: 1 piece (one side blue, one side pink); Cloth cover: 1 piece size: Height 6.9 inches (17.5 cm) x Width 7.1 inches (18 cm); Quality display: Main bag: Heat resistant nylon content: High water absorbing resin, stabilizer, preservative, water cloth cover: 100% cotton; Height: 6.9 inches (17.5 cm) x 18 cm); How to cool to boil Hot water with a stopping flame. Soak in about 5 minutes and warm it up. Note: When cooling, do not freeze at -6°F (-30°C). The bag may tear. If the contents have stiffness or unevenness, or if they are deformed, please gently loosen it. ★ When warming or removing from hot water, use chopsticks, etc., and be careful to burn and wipe away the moisture that has been attached to it. Please check the temperature before using to avoid burns. Never overheat in the microwave.