Magma Party Size Kettle Grill CoversMagma Party Size Kettle Grill Covers are constructed of Sunbrella solution-dyed acrylic fabric, the same fabric used for boat covers. This fabric is water and fade resistant, breathable, and designed to resist damage from UV rays and mildew. 5 year warranty covers the fabric becoming unserviceable because of loss of color or strength from normal exposure conditions including sunlight, mildew, rot, and atmospheric chemicals.; 1 year warranty on all other compounds.;