PremierAcCovers AC Summer/All-Season Full Cover H.O.H. Approved 36x36x35 Gray Provides full protection from leaves and debris buildup in your ac unit. PremierAcCovers Summer/Allseason full covers are made of heavy duty long lasting, open mesh material. Our Summer/Allseason covers may be left on while the unit is running. Full 5 year manufacturer's warranty. 100 percent satisfaction guarantee