Why do you need special suits to go underwater?

Special suits, like wetsuits or drysuits, are essential for underwater activities because they provide thermal insulation, protect against cold water, and shield the body from abrasions and marine life. Wetsuits allow a thin layer of water to be trapped between the suit and the skin, which warms up with body heat, while drysuits keep the wearer completely dry by using an airtight seal. Additionally, these suits often have buoyancy control features, enhancing safety and comfort during dives. Overall, they help ensure divers can safely explore underwater environments.