Have you met this kind of problems? 1. air condition can't keep your room cold or warm 2. Always have dust on your surface. 3.Noise reduces your sleep quality. 4. Your floor usually gets soaked after winding and raining This is the reason we need these under door seals. Nice door draft blockers for all season protection, It is made of high quality silicone, non-toxic, durable and flexible, wind blocker, dustproof, noise reduction as well as prevent the cold air in, makes your room more warm in cold winter, more cool in Summer, helps a lot to save electric bill. With this entry door weather-stripping and seal the crack, make life more safe and more comfortable. A practical weather stripping for doors. * 1 pack> * material: silicone * size: 1.9” W x 39” l * color: White * weight: approx 5.9 ounces * Suitable gap: 0 to 1" * Suitable door material: wood, Glass, metal, plastic