This wrist rest pad by Topoint is a simple design that works great to hold up my wrists while typing on my laptop. This is spill proof and can wiped clean. This has plenty of give while resting my wrists on the pad, it is soft. I have had no problems with this sliding around while typing. The rest pad is made well and has no loose threads or loose stitching. This rest pad costs: $12.99.
The link is in the comments.