Socket sack flaxseed eye pillows can be used hot or cold to soothe: headaches, migraines, allergy, and sinus pain and pressure, sore red eyes, and general stress. This is also great for a nervous air traveler to stay "lavender calm" or as a meditation tool. Microwave 30-40 seconds or freeze 1 hour. Rest on tired eyes & melt or cool the stress away. Handle hot items with care. Spot clean only.