3-in-1 Design: VEVOR 30.48 m x 1.22 m double reflective insulation roll features a versatile 3-in-1 design: radiant barrier + insulation + vapour control, ensuring exceptional thermal performance. Excellent radiant barrier keeps you cooler in summer and warmer in winter Four-Layer Protection: Featuring double-sided aluminum foil coating and double-layer air bubbles, this 6 mm thick thermal insulation roll effectively reflects sunlight and blocks heat transfer in summer, while preventing heat loss during winter Reflects Over 95% of Heat: Featuring high-density aluminum foil coating with outstanding heat reflectivity, this double aluminum foil air bubble 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, RVs, houses, bungalow roofs, etc, offering effective heat blocking and insulation