All age groups can have hours of fun using their 13" Warmies® knowing that they can be warm all night long. For adults seeking some gentle relief for aching muscles or sore joints after a long and hard day, Warmies® are ideal. Warmies are gently scented with French lavender that is carefully sourced from local growers in Provence. Quick facts: Simple to use - just warm in a microwave. Can be reheated hundreds of times. Do NOT immerse in water or wash in the washing machine - surface clean only with a damp sponge.