**Kempf Water Retainer Entrance Mat - 4' x 6' Brown Indoor/Outdoor Rubber Rug - Heavy-Duty Moisture Trapping & Absorbent Doormat - Perfect for Mudrooms, Garages, and Entryways**

These mats are amazing on their own and much more so when you consider the price. They are well made, come in nice colors (I was a little worried they'd be too colorful), and have great features. I don't know how they will stand up in the rainy season but this summer has been off to a wet start here in the northwest and so far, these mats are greatly reducing the tracking of the muck that comes in on our shoes. I sweep almost daily and am always pleasantly surprised what comes out of the mat when I turn it over. The grooves really hold a lot and you'd never even know all that was in there. The backing of the mat is designed to grip on a carpet or hard floor and it performs this task well. And last but not least, these mats have a low profile. I've got some doors with little to no clearance between the weather stripping and the floor and they always catch the rugs. These mats are slim and sturdy enough that the weather stripping can't pick them up so they stay put.Update: After owning and using this item for a couple of years now, I have noticed a problem with the mats. The backing seems to release some sort of residue. On the hard floor, the area underneath seems polished. As I sweep, I can feel the change in the surface as the broom passes over the area that was under the mat. There is however, no visual difference in the floor's appearance. But sadly, the area under the mat that sits on the carpet in front of my sliding door is discolored. It is possible this has something to do with the age of our carpets but considering there is a noticeable difference with both surfaces, I'm thinking it has something more to do with the backing of the rug. It did take some time for this to happen as I didn't notice a problem until after two years of use. The carpet is a light beige color and looks dingy and somewhat orange where the mat sits. I have not attempted to clean the area with a shampooer yet but will update this post as soon as I do.Other than this problem, the mats are wonderful and are showing no other signs of wear. I'm thinking an easy fix for this issue might be to put down a piece of rug grip underneath.