Cotton door curtains feature an increased density treatment inside, with a special grid fiber added for further densification of the civil cotton felt! Both sides are made of leather or canvas, offering high tensile strength! These cotton door curtains are relatively heavy, have excellent thermal insulation properties, and can block the loss of cold and warm air! They can be used singly or in layers, providing main features such as insulation, soundproofing, and windproofing! The cotton door curtains can have an open viewing window, making them aesthetically pleasing and a good choice for insulation and cold prevention. Sizes can be customized to meet your requirements!