The Pod has an IPX8 waterproof rating; this international standard means that the Pod has been tested to function normally in 25 feet of water for up to 60 minutes. As a precaution, if you plan to be in water for a long time, we recommend that you get out occasionally to make sure that the adhesive is still securely attached to your skin. Because the temperature of most hot tubs can spoil insulin, making it ineffective, we do not recommend wearing the Pod in a hot tub, unless you keep it out of the water.