Made of soft pvc and gel inside. wear it to make you cool or warm when sleeping. Soothe strains and pain with our reusable, microwaveable hot/cold packs. These packs stay flexible, even when frozen. We can rush service and the price includes shipping cost to ca. They are cost effective and long lasting! It is available in several colors and can be customized with a brand imprint. Welcome you rush order. 100% guarantee for quality, We are GLAD to get SINGLE PIECE ORDER.