- Product function: Heat insulating door curtains block cold outside air, help maintain indoor temperature, and prevent hot air from entering in summer and cold air in winter. They can also prevent the air conditioner from working improperly, saving energy and keeping the room warm in winter and cool in summer. - Eco-friendly material: Made from environmentally friendly high density PVC material. It is airtight, windproof, waterproof, heat-insulating, temperature insulating, non-squeezing, and not cracking in winter. The fabric is soft and smooth, safe and durable, and designed to perform well in diverse conditions. - Automatic closing: The central groove contains a strong magnet that closes quickly and automatically with no noise. This keeps hands free when you bring children into the house, and the curtain automatically seals against cold wind in strong winds. - Easy to use: No drilling required. The Velcro fastener attaches directly to the door frame; align the tape to install the curtain quickly and practically. The included nails provide extra stability for a secure fit. - Practical applications: - Use at frequently used interior doors (entryways, kitchens, or living areas) to reduce drafts and stabilize room temperature. - Ideal for homes with children or pets, allowing effortless, hands-free passage. - Suitable for rental homes or settings where drilling is undesirable, thanks to the quick Velcro installation and added nails for stability.