This cover's outer layer is made using 100% 300 denier black polyster. Premium high thread count weave for strength and durability. Reinforced seams in the fabric help increase durability. Additionally, the fabric is treated with Rust-Oleum® NeverWet® superhydrophobic treatment, keeping your oven dry in wet conditions. EverBlack technology reduces fading keeping your cover looking like new longer. This cover will not crack in the cold or blister in the heat.