"...Take for instance, the Mt. Washington Powder Rocket by Mad River Rocket Company ($89.95). Designed by architect David Sellers and his pals for the powder at Prickly Mountain in Warren, Vt., this 6-pound sled’s maximum maneuverability brings riders to their knees…literally. Its unique kneeling position secure thanks to ribbed knee pads and quick-release lap belt gives a heightened line of sight and allows the rider to easily lean and brace along tight curves and over jumps. Rocketeers need not worry a minute about slippage either; the underbelly of the sled’s strong polyethylene body is home to Rocket’s patented “negative keel” which packs a monorail of snow under the sled so the rider can traverse without slipping, but easily break through with a weight shift to change direction..."