Carpet Plus Heather Charcoal 6' x 10' Entrance Door Mat The vinyl backing help to reduce floor mat movement. Olefin yarn is stain and mildew resistant. Perfect entrance mat for use in moderate-traffic, indoor/ covered outdoor areas. Floor mats available in solid and two-tone heather colors. Recommended for hard-surfaced floors. For carpeted-surfaces floors, we recommend the Deluxe Carpet Entrance Mats with a gripper backing.