Air Conditioner Covers - Winter Breathable Tight MeshTop - 37x34 - Gray PremierAcCovers Provide top protection during winters harsh elements with its tight breathable mesh and does not cause rusting. This cover is NOT waterproof. We also sell Premier waterproof tops. Highly resistant to sunlight, mold, mildew, and temperature extremes. full 5 year manufacturer's warranty. 100 percent satisfaction guarantee