Big on Batik bathing suits are made from rayon Lycra (85% rayon, 15% lycra). This fabric is extremely soft and stretchy, making an incredibly comfortable bathing suit. However, our bathing suits should not be worn in public hot tubs or frequent use in public pools. Hot and/or heavily chlorinated water will fade your suit. Better to wear your Big on Batik suit in residential pools and hot tubs, salt water, or fresh water. As with all bathing suits, you'll get more wear if you rinse your suit after swimming.