Patent ID: 8042827

Claim:
A snowboard or ski comprising: (a) a board or ski having: (i) a sole wherein the sole is flat when seen in cross-section and when not under tension, the sole having a middle part, a left-hand side part and a right-hand side part, and having outermost steel edges; (ii) a longitudinal direction extending along a length of the board or ski; and (iii) at least one bendable zone extending in the longitudinal direction in the board or ski; wherein the at least one bendable zone comprises a thinner area of the board or ski; and (b) tensioners constructed to hold the left hand side part and the right hand side part of the sole permanently flexed upwardly so that the steel edges are higher than the middle part of the sole, when seen in cross-section, and the resulting curving of the sole being substantially greater inside the tensioners than close to the steel edges; (c) wherein the tensioners are transverse tensioners and wherein on upper sides of a right-hand part and a left-hand part of the board or ski there are attachments constructed to secure the transverse tensioners so that said upper sides of the board or ski can be drawn towards each other using the tensioners, thereby ensuring that the board or ski retains an upwardly flexed shape.