A pool float is an inflatable device used to provide buoyancy in a swimming pool. The most common type of pool float is a RAFT, which is a four-letter word that can be used to solve the crossword puzzle. Pool floats are typically made from vinyl or foam and come in a variety of shapes and sizes. They are designed to provide support and comfort while floating in the water. Pool floats are a great way to relax and enjoy the water without having to swim.