Abstract: A sole includes a rear end portion on a rear end side, and a rear portion arranged anterior to the rear end portion; a rear surface of the rear portion includes one inclined surface extending in an upper-rear diagonal direction; a front surface of the rear end portion includes another inclined surface extending in an upper-rear diagonal direction; the inclined surface of the rear portion and the inclined surface of the rear end portion together define a first divide portion at which the surfaces are in contact with each other or are capable of contacting each other; and the inclined surface of the rear end portion is set so that the inclined surface is rotatable relative to the inclined surface of the rear portion in such a manner that a lower portion of the divide portion opens.

Abstract: A main sole includes a toe-side first portion, a second portion arranged posterior to the first portion, and a third portion on a rear end side; and a first divide portion is defined by a first inclined surface extending in an upper-front diagonal direction at a rear surface of the first portion and a second inclined surface extending in an upper front diagonal direction at a front surface of the second portion.