The towel works intuitively. You simply place the side with the silicone eco-nubs face down on the yoga mat or low-pile carpet. Once you distribute your weight in a yoga posture, the eco nubs start gripping the mat, thus keeping your hands or feet from slipping in mid-stretch.
The towel is made from 80% polyester and 20% nylon. It is absorbent and is machine washable and dryer safe. It measures about 24×68 inches.