Their arms wrap around each other and attach with Velcro making them perfect for mixing and matching to other Warmies® Hugs characters. You can also attach them anywhere and bring them with you on the go. These characters are TWO cute not to LOVE. Warmies® is suitable for all ages. 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.