PremierAcCovers - Leaf Guard Summer/All Season - Open Mesh Air Conditioner Cover - Keeps Out Leaves, Cottonwood and Debris - 37x34 -Black Air conditioner covers to provide top protection from leaves and debris buildup in your ac unit. PremierAcCovers Summer/ Allseason top ac covers are made of heavy duty, long lasting, open mesh material and may be left on while the ac unit is running.. Ac covers extend the life of your ac unit. PremierAcCovers are made in America using American Materials and Labor .