A really nice type of sled. The flexible flier has two runners going the length of it, supporting a wooden seat and joined in the front by a pivoting footrest-type bar used for steering. To steer left, you push your right foot against the right side of the bar, which causes the runners to bend to the left.

Flexible Flier type sleds tend to go really fast, since they have only two thin runners which cuts way down on friction. The only weakness is stopping, which with the absence of formal brakes can only be accomplished by running out of momentum (which can be hard mid-hill) or by falling off and holding the rope. But stopping is for wusses anyway.