Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Needs a water barrier! Had to replace immediately.

This thing can trap a few loose pieces of cat litter; but will not protect your carpet or hardwoods from anything. I have a big cat and sometimes his butt hangs out of the box a little bit. So, the mat can get a little wet on occasion... might as well just use a towel under your cat box as opposed to buying this.