Acoustic Self-adhesive Creative Doorstop Windproof Insect Dustproof Door Bottom Sealing Strip

I ordered it for the winter, as the wind can be felt in the room. Anyway, I haven't been able to try it yet. The material is quite simple, although if it does the job, I'll be happy with the purchase. It's like a foam rubber, as you can see in the pictures. To give you an idea, it's like the foam on children's floaters when they learn to swim; it would be the same type of foam. Then it has a rubber strip, which is the one that goes on the floor, and it opens a little or closes to adjust to the thickness of the door. I don't know how long it might last, but I imagine that once it's placed on the door, it won't have many drawbacks.

Draft protection Differs from the photo, but this might also be a plus, as there's nothing to glue. My grandmother has an interior door without a threshold, and it gets drafty in winter. I hope it will suit her.