Features: 1) Flame-retardant 2) Made with special advanced composite technique and special adherents to compound the dense film 3) Flat and smooth aluminum foil surface 4) High light reflection 5) Strong horizontal and occidental pull 6) Air and damp proof 7) Good tightness 8) Strong wearability Structure: 1) Aluminum foil: 7, 9um 2) Adhesive: flame-retardant type 3) Glass fiber cloth: 14 x 12, 14 x 14