The Bungalow Flooring Argyle Stair Treads - Set of 4 is a set of fabulously functional stair tread mats that are made tough to endure any weather condition. Place these UV-protected, non-skid mats indoors or outdoors. Water dam technology doesn't allow moisture to roll off the edges of the mat, keeping your flooring dry. The polypropylene face is etched with diamonds and won't crush or break down over time. Made in the USA.