FEATURE: *Simple and effective *Easy to install & use *Moves with your door *Works with any floor surface *Open and close the door *No need to constantly bend over to re-position *Double sided = Providing double the protection 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. With this door seal, you can say goodbye to these situations. After installing on the door, it is very tight to keep warm and cold air out of the room and block out the noise, block out the smell, block out the light, to create a comfortable environment.