Wearing a Libreband or Dexband will help to protect a sensor from the friction caused by swimming and being in water, such as in a hot tub. The cover and neoprene armband are themselves water-resistant, however, the product does not provide any additional waterproof protection to the Libre sensor - nor do stickers or patches.Love My Libre customers include competitive athletes, who have worn our armbands for swimming and water activities and have found it helpful for protection and in giving them confidence in water whilst wearing a sensor, especially when doing so for an extended period.There's more about Swimming with a Libreband in our blog here or see our YouTube video, click here.