"You can definitely steer them like a small car or bobsled because you're strapped in and can set an edge and turn and stop," says Smith. Participants kneel on the sled, put their hands in the air, as if they're holding ski poles, and swoosh through the snow, down a packed path or off-road in an "s" formation. "It takes the idea of sledding to the next level," says Smith. "You can go through the trees, make a turn, navigate a trail." A "negative keel" on the underside of the sled packs a monorail-type formation in the snow which prevents slipping.