Zippered protective plastic for doorways and under openings. It effectively stops dust from escaping the sealed area while making it easy to get in and out of the sealed space.

Spread the door over the entrance to the room you're protecting and tape it to the frames. Thanks to the closable zipper, dust inside the room won't get out during work. You can also use it with temporary partitions to split a room into two separate parts. Made from thick plastic, so the door won't tear easily in use.