These insulated doors, designed specifically for cold storage, are capable of withstanding temperatures as low as -30°C. The entire door curtain consists of five layers: thickened PVC insulation curtains on the inner and outer layers, with a core made of specialized thermal insulation material. They feature flame-retardant, low-temperature resistance, tear resistance, and abrasion resistance. The total thickness ranges from 15 mm (for temperatures down to -18°C) to 20 mm (for temperatures between -18°C and -30°C). Both sides feature special PVC seals that provide excellent sealing performance, preventing cold air from escaping and hot air from entering. Customers can choose from a variety of colors, including blue, white, and orange.