Firesara adult silicone swim hat is made of 100% natural silicone, harmless, durable, and tear resistant; as a result, it is easy to put on and off without causing snag or pulling hair. Firesara professional swimming eyewear is made of 100% non toxic silicone, smooth, durable, and non toxic ; as a result, it ensures a snug and secure fit in your eye socket along with watertight seal.