TEESHLY Non-Slip Extra Large Bathtub Mat, 40 x 16 Inch, Gray

This tub mat is sized larger than most standard options, giving extra floor coverage so there's less bare, slippery surface exposed around it. It relies on a dense grid of over 300 suction cups to grip the tub or shower floor, and small drain holes are worked into the surface so water doesn't pool on top and create its own slip hazard. It's machine washable, so it can go through a gentle cold cycle instead of needing to be scrubbed by hand, and it's meant to be air-dried afterward. It's designed specifically for smooth surfaces, and the suction won't hold as well on textured or non-smooth tile.