Rubber-Cal 6-Piece New Amsterdam Non-Slip Treads Rubber Step Mats, 9.75 by 29.75-Inch, Black Made with natural and reclaimed rubber products Easy to clean-simply wipe or rinse stair mats with water Installation is easy, with no messy glue or adhesives required Excellent level of foot traction to keep footing secure and prevent unwanted accidents Perfect stair tread mats for indoor stairways, outdoor Stairways and commercial stairs