The Sibel Drying cap is made of heat resistant fabric in silver. It is very flexible and washable. The tube is reinforces with a flexible metal wire and foreseen of an elastic that is fixed to the end of the hair dryer. On the head part there is a cord that can be adjusted to the size of the head that keeps the hood in place (better to adjust this cord under the ears for a better fit). The head part and the tube do have ventilation holes to improve air circulation.