The enclosure fits most pyramid patio heaters. Made of woven polyester with a waterproof backing to keep out rain, snow, sun, and dust. Protect Your Furniture: Double insulated, waterproof, and weatherproof to protect your heater from UV rays, wind, mildew, and water. EASY TO CLEAN - Wipe with a damp cloth or hose, then dry in the sun for your next use. The zipper The zipper ensures secure placement and easy removal. This product is made of 210D Oxford cloth covered with waterproof and silver-coated cloth (silver coating can prevent ultraviolet rays and heat dissipation), which can prevent snow and frost in winter, sunscreen and sunshade in summer, and can prevent falling leaves from causing us trouble in autumn. Dust, many functions, universal in all seasons. Simple installation, light weight, easy to fold and carry. Environmental protection nano material, anti-aging, life cycle, waterproof, anti-ultraviolet, heat dissipation, firmness is better than polyester.