The SCX, for "SideCut eXtreme", was an alpine ski introduced by Elan in the winter of 1993/4. Skis before the SCX had almost always used a shape that was slightly curved inward on the sides, typically by 7 millimetres (0.28 in) compared to a straight line running from tip to tail. The SCX was designed with over 22 millimetres (0.87 in) "sidecut", producing a wasp-waisted ski unlike anything on the market.

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.