HeavyDuty Beathable Tight Mesh Winter Top Air Conditioner Cover - 32x32 - Gray Provides top protection during winter with its tight breathable mesh and does not cause rusting of ac unit. This cover is NOT waterproof. We also sell a Premier waterproof top. Highly resistant to sunlight, mold, mildew, and temperature extremes. 5 year manufacturer's waranty. 100 percent satisfaction guarantee