Easy to installs: none tools required, the back adhesive is firmly attached to window frame, suitable for quickly sealing of renters and temporary residences Thickened double-layer stitching edges, smooth and non jamming zipper, ables to withstand long-term use, solving the problem of frequent opening and closing and easy damage High densities polyester fabric composite coating can block the penetration of strong winds, effectively reduce indoor and outdoor temperature difference conduction, and save electricity for cooling in hot weather The double piece zipper design seamlessly connects to the mobile air conditioning exhaust pipe, prevents cold air leakage and hot air backflow, making it suitable for quiet and low-temperature environments such as bedrooms and attics The standard width of 38cm is suitable for most inclined roof window and can cover different window frame sizes, making it suitable for old-fashioned inclined window, skylights, and other irregular window, Manufacturer: NRVTRE