Alpine snowboarding is for those of you who are a little more extreme about speed than most. Alpine snowboarding encompasses more than just speed. Other areas often included are racing and extreme carving.
Alpine snowboards are uniquely designed for their purpose. An alpine snowboard has a longer, narrower and stiffer construction than any other snowboards. This design allows for higher speeds, very sharp turning, and aggressive edge holding power on hard snow and excellent high-speed stability.
Alpine snowboarding is generally done on hard packed snow or groomed runs. Hard packed snow usually isn't good for snowboarding but is exceptional for high speeds, the heart of alpine snowboarding. With other styles of snowboards maneuverability is impossible on this type of terrain. Thanks to the aggressiveness of the edge of the alpine snowboard, fast, snappy control is the least of your problems.
Since the riding is so different from other types of snowboarding it only stands to reason that the gear would also be slightly different from normal. The gear for alpine snowboarding resembles skiing equipment more than it does snowboarding equipment.