Double wheels make for better balance and control in this sporty and fun-to-wear skate shoe from Heelys. The Dart shoe features a comfy, cushy slip-on design and is easy to use: The wearer simply shifts his weight to the heel and is on an instant roll! He can also remove the wheels and snap in the heel plug, and he's got a cool pair of street shoes. Easy skating with two wheels in the heel. HX-2 Technology - once you master it just remove the front wheel from each shoe & learn to skate like single wheel Heelys Pro