mockins Himalayan Salt Pillow is economical, safe and can be a direct method of relieving pain. This item can be used on any size bed , queen bed , king bed , twin or massage table .This pillow is easy to use. Can be used as a cooling pillow or warm pillow. You can simply warm up your pillow in a pre-heated oven at 175 degrees (for 5-7 minutes) or in a microwave at minute intervals. If you would like to use the pillow cold, you can simply put the salt pillow in the freezer or refrigerator until the desired temperature is reached.