This weather strip is made of soft rubber and can be trimmed to fit all doors or windows up & will not freeze or break under extreme temperatures. It also can effectively isolate wind, water, light, temperature and sound. The door seal has a special hollow design which can reduce the transmission of sound and full temperature on both sides of the door, and this design can reduce the pressure on the door of the door frame when closing the door, and reduce the sound of closing the door.