Based on other reviews I was wary that my dog would either lengthen or snap this, but it holds up well and doesn't flex at all when I pull on it. The only way to get a flow of air into my apartment is by opening the front door, all my neighbors have dogs and my curious excited 75lb GSD is poking his nose in and I wasn't afraid he would get lost . TO UPDATE. Dog but not me, I didn't realize it was locked on a closed door, I ripped the door open, it ripped off a huge piece of drywall, the instructions say not to attach it to the drywall I'm looking for. Replacement 3M tape to attach to door frame전체 리뷰보기