This one has little gripper teeth on the bottom and it lies flat no problems. The former one had no teeth and it bunched up all the time. This one’s a keeper.
It's not a bad chair mat but it is a little thin and as such quickly develops impressions where the chair wheels set. Afterwards the chair doesn't roll as freely. However I'm sure a heavier one would likely cost more.
I got the mat in amazing fast delivery time. However there was a previous barcode sticker on the underside that was peeled of part of the way! It was stuck in all the teeth that keep it from sliding and because it is clear it is unsightly and ugly! It detracts from the appearance of my office space! I selected this mat because of its sharp crisp clear design. It looks cheap because of the sticker i cannot get off w/o risk of damaging the mat. I EXPECTED MORE!
Worked great once I was able to unroll it. To get it soft and ply able I put it out on the deck in the sun for and hour. Size is right and saves the rug