Sit-skis are for wheelchair users or other skiers who have paraplegia. The first sit-ski was made in 1967 by Josef Shrall. Shrall is from the Bavaria in Germany. The first sit-skis had two wide skis, brakes, and were made special to fit a skier. The weight of the sit-ski made it so no skiers could ski moguls or on steep slopes. Sit-ski kept getting made better in the 1980s. A new type of sit-ski was made in Engelberg, Switzerland in 1987, and people were able to see it at a workshop made by the Swiss Association of Paraplegics. As the technology got better, a chair was made that could be added to the skis, made for skiers who had no disability. Now sit-skis are made from fiberglass and polyester. Sit-skis now have much less weight, allowing skiers to ski on steeper slopes and race in the moguls. Now sit-skis include seat belts. Sit-skis for people with disabilities and skis for people who do not have disabilities have improved to become special for different types of alpine skiing races.