Due to from constructed flexible plastic it can reach the non flat surfaces of the pool. Rectangular in shape and made from sturdy yet flexible plastic, this vacuum head is just what you need for removing debris from the floor of your pool. It doesn't float but stays at the bottom of the pool where it cleans efficiently. Three rolling wheels assist in gliding along and in routine cleaning yet will not scratch or mar the surface of the pool. Removes leaves, bugs or fine debris.