Some are, and some aren’t. Samsung’s newer foldables, the latest Motorola Razr models, and a few select others are fully waterproof – but you won’t want to take an Oppo or Honor folding phone out in the pouring rain. Check the tech specs before you buy. So far only the Motorola Razr 40 Ultra and Razr 40 include any dust protection, so any other folding phone should be kept away from the beach!