As @Kh1985 says, you’re probably going to have to remove the competition retailers from your post.
However…
In terms of favourite items that fit your bill, I have two, the first is the Lovehoney Watercolour Robe which I wear all the time. I absolutely love it. I also have the chemise set that goes with it but tend to just put the robe on when I get in after having a shower. You can read my review here if you like.
The second is the Leg Avenue Long Robe. It looks great over nearly all lingerie and is incredibly flattering. Really good for us taller ladies as it is very long. Not quite as practical at staying tied as the other one but certainly a statement piece. Again if you’d like to read my review it’s here.