This is a para-Alpine and para-Nordic sit-skiing classification, where LW stands for Locomotor Winter. To generally be eligible for a sit-skiing classification, a skier needs to meet a minimum of one of several conditions including a single below knee but above ankle amputation, monoplegia that exhibits similar to below knee amputation, legs of different length where there is at least a difference, combined muscle strength in the lower extremities less than 71. Skiers in this class "may have Grade 3-5 hip flexion and extension (unilateral or bilateral)". This classification is comparable to para classes 5 and 6. When not skiing, the competitor may be able to walk with or without the use of assisitive devices. This class is the equivalent of LW4, but skiers must choose to compete in LW4 or LW12: they cannot compete in both classifications during the same skiing season.
