About MBS
From the MBS webiste:
What is a mountainboard? A mountainboard is part snowboard and part skateboard. Mountainboards include a snowboard-like deck, adjustable turning system, air-filled knobby tires and an open-heel binding system. All MBS mountainboards can be outfitted with a hand-held V brake.

What is mountainboarding? Mountainboarding is essentially snowboarding but done on grass, dirt or pavement. Apply pressure on your toes or heels to initiate turns. With a mountainboard your terrain is limitless and you can ride ALL YEAR LONG! Mountainboarding started in the early 90ís when friends Jason Lee and Patrick McConnell started making boards to help snowboarders cross-train during the dry summer months. Since then mountainboarding has developed into a sport in itís own right with itís own culture and history and includes racing, freestyle, freeride and kiting disciplines. Mountainboarding is done in over 30 countries and continues to be one of the most exciting and fastest growing board sports.

Where can I ride a mountainboard? Only on a mountain? You can ride a mountainboard almost anywhere. In fact you really need only a 5 degree slope to have enough speed in which to carve. Generally grass hills are an ideal place to learn. Additionally you can ride on bmx tracks, dirt roads and pavement. The question is more "Where can't I ride my mountainboard?" The answer is you can ride it almost anywhere you want.

Is mountainboarding hard to learn? Mountainboarding is quite easy to learn for anyone with generally good balance. In fact it is much easier to learn than snowboarding. Within one hour most people can learn how to carve in both directions and in total control.

What additional gear do I need? We recommend wearing it all. Helmet, elbow pads, wrist guards, leather gloves, long pants, knee pads, sturdy shoes, eye protection. The safer you feel the better you will ride and when you do take the eventual tumble you'll get right back up and ready to ride again.