Huggies Little Swimmers Swimpants are unlike regular nappies. Regular nappies swell up and can make swimming difficult for your little one in the water. Most public pools don’t allow them to be used when in the water. Huggies Little Swimmers Swimpants however, are waterproof disposable swim nappies that help prevent embarrassing little accidents occurring in the water. At the public pool they are essential for non-toilet trained toddlers, babies and infants.