Energy saving design The doublesided door stopper blocks air flow from both sides, reducing heat loss and helping keep rooms cool in summer and warm in winter. This doublesided draft stopper enhances energy efficiency by preventing drafts from entering or escaping through the gap under the door. Noise reduction The door sealing strips help reduce noise transmission from outside or adjacent spaces. The lightweight, flexible, and adjustable seal provides an effective barrier while maintaining a comfortable room environment. Safe, floorfriendly materials Made with PVC and Ultraloft materials, this Windstopper style excluder is safe and odorless. It is flexible and adjustable for a good fit, and it won't damage floor surfaces. Easy installation installs in about 30 seconds without glue or drilling. Simply cut the seal to match the door width and slide the cut seal under the door. It is flexible, durable, and designed for long service life. Compatibility and sizing The seal can be cut to fit the door width, making it adaptable to a range of standard doors without special tools. Use scenarios Drafty exterior or interior doors in winter: reduces heat loss and improves comfort, helping save on heating costs. Apartments or offices near busy streets: reduces noise transfer for a quieter space. Rooms with hard floors: floorfriendly design that seals gaps without causing damage or marks. Notes This product emphasizes energy savings, noise reduction, safe materials, and easy, tool installation, while maintaining a professional and trustworthy design. It is designed to fit by cutting to width and sliding under the door for a quick, durable solution.