Whelp, my zippered portable greenhouse cover but the dust after 3 years, and it's an odd size that I couldn't find. Reviewing other greenhouses shows that almost all manufacturers don't sell replacement covers, so what's the point of buying another? This sheeting worked fine, covering all four sides and leaving room to shore up with bricks, making it more effective at staying warm than the original cover ( which I left on). I bought the clips that go with greenhouse sheeting, and it worked great to cut a single slit for the doorway and clip it together. Very heavy, durable material.