Excellent Heat Insulation: Crafted from double-sided aluminum foil and wear-resistant PE woven fabric, our 48 in x 250 ft, 0.15mm thick double reflective insulation roll efficiently reflects sunlight and blocks heat transfer in summer, while preventing heat loss in winter Perforated & Breathable: The perforated structure allows air and moisture to pass through, preventing condensation buildup. This helps maintain consistent insulation performance, improves air circulation, and extends the insulation roll's lifespan ≥95% High Reflectivity: Featuring high-density aluminum foil coating with outstanding heat reflectivity, this double aluminum foil woven fabric radiant barrier reflects more than 95% of solar heat, delivering superior heat blocking and thermal insulation Easy Installation: This double-sided aluminum foil insulation roll is easy to cut and install, just DIY the roll size and shape to meet your different needs. When not in use, it can be easily folded up for space-saving and convenient carrying Versatile Applications: Our thermal insulation heat shield is tear and puncture-resistant, scratch and wear-resistant, durable and lightweight. It's perfect for windows, garage doors, houses, roofs, etc, offering effective heat blocking and insulation