A good spa cover can serve many functions. The first prioirity is usually safety. Covers commonly have locks or straps that keep unwanted people from disturbing a spa or young children safely separated from a potential drowning. Spa covers can also save on energy costs. A cover that fits well will keep heat trapped where it belongs which drastically reduces heating bills, on top of this it will keep the room from getting too humid.
Today's spa covers match a variety of room styles. Many covers also have more padding and can double as furniture.