Lavender is a traditional natural relaxant so pillow can be used at room temperature to assist with sleep, migraine, tension headaches, stress, eye strain, puffy eyes etc. Can also be refrigerated or stored in freezer to help treat headaches and bruising. Note: When refrigerating or freezing, place pillow in a WATERPROOF container. DO NOT SUBJECT TO HEAT or MOISTURE. Storing in freezer should also assist to keep organic contents fresh. 25cm x 11cm. 175gm. Filled with dried lavender heads and linseed