Skiing is the use of skis to glide on snow. Variations of purpose include basic transport, a recreational activity, or a competitive winter sport. Many types of competitive skiing events are recognized by the International Olympic Committee (IOC), and the International Ski and Snowboard Federation (FIS).
Alpine skiers
Spring ski touring on Hardangervidda, Norway
Four groups of different ski types, from left to right: 1. Non-sidecut: cross-country, telemark and mountaineering 2. Parabolic 3. Twin-tip 4. Powder
Giant Slalom Ski Racer
A ski is a narrow strip of semi-rigid material worn underfoot to glide over snow. Substantially longer than they are wide, and characteristically employed in pairs, skis are attached to ski boots with ski bindings, with either a free, lockable, or partially secured heel. For climbing slopes, ski skins can be attached at the base of the ski.
A shaped alpine ski with relatively little sidecut and classic camber: the tip and tail touch the snow while the midsection is in the air.
Old skis
Asymmetrical skis used by the Danish-Norwegian army in the 18th century, long ski for the right leg, also shown in profile (far left).
Wooden skis with cable (kandahar) bindings and bamboo poles
