Cinknots Grey Black, Grey White rugs Extra thick 4.5 cm pile height provides luxurious sink-in comfort. Relax your feet on the cozy rug, and keep them warm in cold weather. The bottom is made of non-slip rubber bottom, which is safe and non-slip, ideal for daily indoor high-traffic areas and areas that are more prone to chaos in life due to children or pet activities, such as living room, bedroom, kitchen, children's room, nursery, hallway, office, etc.