THICKENED SILICONE MATERIAL - BUILT TO LAST :The Door Draft Stopper is made of pure silicone material that is heat- and cold-resistant, and easy to bend without deforming. This draft stopper for the bottom of the door has no "compression memory," won t damage the floor, and is pliable enough to allow you to easily open the door even on crooked floors. Door strip s sleek finish blends seamlessly with any decor SAVE ENERGY AND LOWER BILLS - COMPREHENSIVE PROTECTION:This Door sweep mainly blocks cold or warm air. As a weather stripping door seal, it keeps warmth in during winter and coolness in during summer, helping maintain energy efficiency. It is suitable for covering gaps on exterior and interior doors, RV doors, shower rooms, baseboards, thresholds, windows, garages, basements, and furniture HOLLOW ARC CAVITY SOUND INSULATION DESIGN - REDUCE NOISE & BOOST PRIVACY:The under door draft stopper features a triple design. This door bottom seal strip not only blocks cold air but also helps block light, creating a quieter home.