Abstract: A ski boot is provided including a lower sole portion and an upper boot portion supported from and secured to the lower sole portion. The upper boot portion is constructed of stiff material, but includes transverse corrugations extending forwardly and upwardly along opposite sides of the upper and across the instep portion thereof. The corrugations enable forward flexing of the upper portion of the upper boot portion as required to enable a skier to bend his knees and to lean forwardly, and the sole portion is substantially rigid, except in the portion thereof underlying the area of the boot in which the ball of the associated foot is to be received. This portion of the sole is flexible to enable localized flexing of the sole when walking and an attachment is provided therefor operable to selectively render the entire sole substantially inflexible, the attachment being worn while skiing.

Abstract: A pair of front and rear abutment members are supported in longitudinally spaced position upon the mid-portion of a ski for vertical and lateral shifting relative to the ski and the abutment members include downwardly facing partial spherical seating surfaces abutted against upwardly facing seating surfaces on the ski. Coiled spring structure is enclosed within each abutment member and connected between the latter and the ski for yieldingly biasing the abutment members into tight seated engagement with the upwardly facing seating surfaces carried by the ski. A ski boot is provided and includes extending opposite heel and toe sole portions having upwardly and outwardly opening V-shaped notches formed therein and the ski boot is snugly received between the abutment members with the adjacent portions of the partial spherical surfaces of the abutment members seated in the upwardly and outwardly opening V-shaped notches in the extended toe and heel portions of the ski boot sole.