The bottom has a textured, anti-slip rubber surface. I love that they are black and hide easily behind my dark hair. Me pareció un poco elevado su precio. I have been converted to the Crocs Universe. Good quality for the cost. These are extremely comfortable they fit perfectly you dont have to worry about going a size up I definitely am going to be buying more of these in the future My only issue is that its not a tight fit on the barbells at my gym. proven good communications up to 65 I would buy them again. It matches my newly installed brushed gold Pfister faucet. I also like the pump because it only allows a little to come out at a time so there is NO waste!