Trisuits are one piece body hugging garments that are designed to run, bike and swim in. They are usually made of a polyester/lycra based fabric. The lycra allows the suit to fit snug without being tight or binding. The polyester allows the fabric to wick moisture and breath. Trisuits have a light bike pad that is designed to hold very little water and dry quickly. Wetsuits, if needed, can be worn over the top of the trisuit reducing transition time.