Cotton door curtains feature an enhanced density treatment with a unique grid fiber added to further densify the civilian cotton felt. Made from materials like leather or canvas on both sides, they offer high tensile strength. These heavy-duty cotton curtains are excellent for insulation, blocking the loss of cold and warm air. They can be used singly or in layers for enhanced thermal insulation, soundproofing, and wind resistance. The curtains can be equipped with viewing windows for an aesthetically pleasing look, making them a great choice for winterproofing and heat retention. Sizes can be customized to meet your requirements!