Abstract: There is disclosed a ski which has a tip portion, a tail portion, a boot support portion, and parallel runners unitarily united at the tip portion, the tail portion, and the boot support portion and providing a channel running the full length of the bottom of the ski, the channel, forward and rearward of the boot support portion, being open from the bottom to the top thereof. One or more bridges affixed to the tops of said runners and spanning open portions of the channel may be provided. Also, if desired, the portion of the channel under the boot support portion may be partially filled in.