The mat comes rolled up in a tube. The leaflet says that the ends will lie flat after a few days. Well it’s been a couple of weeks now and they’re still sticking up. I tried rolling it up backwards and putting it back in the tube for a day and that helped, but it still isn’t completely flat. I guess I’ll see how it goes. Also, I’ve noticed that occasionally the wool threads get caught on the underside of the mouse which briefly stops you moving the mouse.