1. PREMIUM MATERIAL:Our Reflective Bubble Insulation Sheet is made of high-quality reflective aluminum film material and vacuum-sealed polyethylene bubble film. The circular surface design enhances reflectivity, allowing it to withstand strong sunlight without affecting the indoor environment.Insulation provides excellent insulation performance, reducing heat transfer effects and ensuring warmth in winter and window insulation summer heat and cool in summer. 2. TEMPERATURE PROTECTION:The reflective insulation film has aluminum foil on both sides.avoid heat loss, stops winter cold, window insulation for summer heat to stay cool in summer ,year-round comfort. 3. WIDE USAGE:Use Insulation Roll to insulate in the summer and insulating foam to retain indoor heat in the winter. Reflective Bubble Insulation Sheet are suitable for windows, attics, garage doors, walls, floors, fireplace surrounds, radiator reflectors and more. 4. EASY TO USE:Reflective window insulation roll is easy and convenient to use. Simply cut Insulation Foam into the desired size, use the provided double-sided tape to attach it to the window, and then apply the insulation board.