The winter cover that I purchased from the LG shop is a good quality material. However, the bungee cords to hold it on are not adequate in a strong wind so I took the cover to a local canvas shop and had them add two vents (one on each side) and a flap so that I can run the propane furnace while the cover is one. They also attached a buckle to each of the webbing loops where the bungee cords fastened and supplied a length of webbing for each buckle who that the cover can be held on tightly.