The Airex Calyana yoga mats are high quality. The bottom of the mats have a very good anti-slip surface to keep the mats in place. These mats have a superior gripping surface to keep people from moving during a pose which is very important when someone is sweating. The mats are light-weight and durable for busy yoga studios. The mats are washable and easy-to-clean. 73" L x 26" W.