Auxiliary or integrated inner sole structure for footwear

A footwear comprising:

• a footwear sole defining an outsole for engaging the ground and an inner sole part for supporting a foot of a footwear user;
• and
• an inner sole structure mounted on the inner sole part to be engaged by the foot, the inner sole structure comprising:
• a top sole part defining a top side surface thereof, for being engaged by the foot of a footwear user, and an underside surface thereof overlying the inner sole part;
• and
• a middle sole part mounted to the underside surface of the top sole part, the middle sole part comprising an upper supple body layered on a lower rigid body, the upper supple body being mounted to the underside surface of the top sole part, the lower rigid body mounted to the inner sole part, the middle sole part defining a U-shaped configuration with a front open end, a closed rear end, and a longitudinal channel devoid of any material therein extending between the front open end and the closed rear end,
• wherein when the inner sole structure is engaged by the foot, the longitudinal channel under the foot is aligned with a longitudinal portion of the foot extending from a ball position of the foot to a heel position of the foot including an arch and a plantar fascia position of the foot, wherein the longitudinal portion of the foot engages the longitudinal portion of the top sole part along the longitudinal channel opening and the longitudinal channel thereby avoiding tension to the longitudinal portion of the foot, the lower rigid body providing support to the foot.

A footwear kit comprising:

• a footwear comprising a footwear sole defining an outsole for engaging the ground and an inner sole part for supporting a foot of a footwear user;
• and
• an inner sole structure for being mounted on the inner sole part of the footwear to be engaged by the foot, the inner sole structure comprising:
• a top sole part defining a top side surface thereof, for being engaged by the foot of a footwear user, and an underside surface thereof for overlying the inner sole part;
• and
• a middle sole part mounted to the underside surface of the top sole part, the middle sole part comprising an upper supple body layered on a lower rigid body, the upper supple body being mounted to the underside surface of the top sole part, the lower rigid body mounted to the inner sole part, the middle sole part defining a U-shaped configuration with a front open end, a closed rear end, and a longitudinal channel devoid of any material therein extending between the front open end and the closed rear end,
• wherein when the inner sole structure is mounted to the inner sole part of the footwear and is engaged by the foot, the longitudinal channel under the foot is aligned with a longitudinal portion of the foot extending from a ball position of the foot to a heel position of the foot including an arch and a plantar fascia position of the foot, wherein the longitudinal portion of the foot engages the longitudinal portion of the top sole part along the longitudinal channel opening and the longitudinal channel thereby avoiding tension to the longitudinal portion of the foot, the lower rigid body providing support to the foot.