A track and field shoe can include an upper and a sole structure. The upper includes a medial side portion, a lateral side portion, and a toe box portion. The sole structure is attached to the upper and includes a spike plate. The spike plate has an anterior portion, a posterior portion, a plurality of spikes, and a plurality of rails. The spikes extend in an inferior direction from the anterior portion of the spike plate and are configured for engaging a track surface. The rails extend in a superior direction from the anterior portion of the spike plate and extend over an exterior surface of the toe box portion of the upper, and the rails comprise longitudinal axes that extend in a superior/inferior direction.

A track and field shoe can include an upper and a sole structure. The upper includes a medial side portion, a lateral side portion, and a toe box portion. The sole structure is attached to the upper and includes a spike plate. The spike plate has an anterior portion, a posterior portion, a plurality of spikes, and a plurality of rails. The spikes extend in an inferior direction from the anterior portion of the spike plate and are configured for engaging a track surface. The rails extend in a superior direction from the anterior portion of the spike plate and extend over an exterior surface of the toe box portion of the upper, and the rails comprise longitudinal axes that extend in a superior/inferior direction.

Footwear which can be modified and decorated by a wearer includes a sole through which a set of spaced-apart tunnels are formed which extend the full width of the sole. At least one strip of material is wound through the tunnels and along the opposite sides of the sole and the outer perimeter of the heel region to form loops extending between selected tunnel ends along the right and left sides of the sole and the outer perimeter of the heel region. Ribbons of different colors, shapes and fabrics can be attached to and between the loops enabling a wearer to modify the appearance of the footwear.

A roofing shoe traction chassis system has a roofing shoe traction chassis with a toe strap, foot strap and heel strap coupled thereto for securing a shoe to the chassis. The chassis also has a detachable traction sheet configured for attachment to the base of the roofing shoe chassis. The roofing shoe traction chassis can be quickly donned over a pair of shoes allowing a user to wear a more comfortable and better ventilated shoe. The detachable traction sheet can be changed out as the traction layer is worn. An exemplary roofing shoe traction chassis has a strap support that extends up from a support plate and has a toe strap and foot strap aperture to receive and retain the toe and heel straps respectively. The support plate may also have post apertures for receiving and retaining heel strap posts.

A roofing shoe traction chassis system has a roofing shoe traction chassis with a toe strap, foot strap and heel strap coupled thereto for securing a shoe to the chassis. The chassis also has a detachable traction sheet configured for attachment to the base of the roofing shoe chassis. The roofing shoe traction chassis can be quickly donned over a pair of shoes allowing a user to wear a more comfortable and better ventilated shoe. The detachable traction sheet can be changed out as the traction layer is worn. An exemplary roofing shoe traction chassis has a strap support that extends up from a support plate and has a toe strap and foot strap aperture to receive and retain the toe and heel straps respectively. The support plate may also have post apertures for receiving and retaining heel strap posts.

A roofing shoe traction chassis system has a roofing shoe traction chassis with a toe strap, foot strap and heel strap coupled thereto for securing a shoe to the chassis. The chassis also has a detachable traction sheet configured for attachment to the base of the roofing shoe chassis. The roofing shoe traction chassis can be quickly donned over a pair of shoes allowing a user to wear a more comfortable and better ventilated shoe. The detachable traction sheet can be changed out as the traction layer is worn. An exemplary roofing shoe traction chassis has a strap support that extends up from a support plate and has a toe strap and foot strap aperture to receive and retain the toe and heel straps respectively. The support plate may also have post apertures for receiving and retaining heel strap posts.

A roofing shoe traction chassis system has a roofing shoe traction chassis with a toe strap, foot strap and heel strap coupled thereto for securing a shoe to the chassis. The chassis also has a detachable traction sheet configured for attachment to the base of the roofing shoe chassis. The roofing shoe traction chassis can be quickly donned over a pair of shoes allowing a user to wear a more comfortable and better ventilated shoe. The detachable traction sheet can be changed out as the traction layer is worn. An exemplary roofing shoe traction chassis has a strap support that extends up from a support plate and has a toe strap and foot strap aperture to receive and retain the toe and heel straps respectively. The support plate may also have post apertures for receiving and retaining heel strap posts.

Ground-engaging components for articles of footwear include: (a) an outer perimeter boundary rim that at least partially defines an outer perimeter of the ground-engaging component, wherein the outer perimeter boundary rim defines an open space at least at a forefoot support area of the ground-engaging component; and (b) a matrix structure extending at least partially across the open space at least at the forefoot support area to define an open cellular construction with plural open cells in the open space at least at the forefoot support area. A plurality of these open cells of the open cellular construction have openings with curved perimeters and no distinct corners. Additional aspects of this invention relate to ground-engaging components that are very lightweight yet very stiff, particularly in the forefoot support area. Two or more sizes of the ground-engaging components may be provided with substantially constant forefoot stiffness (optionally substantially constant over a size run).

Ground-engaging components for articles of footwear include: (a) an outer perimeter boundary rim that at least partially defines an outer perimeter of the ground-engaging component, wherein the outer perimeter boundary rim defines an open space at least at a forefoot support area of the ground-engaging component; and (b) a matrix structure extending at least partially across the open space at least at the forefoot support area to define an open cellular construction with plural open cells in the open space at least at the forefoot support area. A plurality of these open cells of the open cellular construction have openings with curved perimeters and no distinct corners. Additional aspects of this invention relate to ground-engaging components that are very lightweight yet very stiff, particularly in the forefoot support area. Two or more sizes of the ground-engaging components may be provided with substantially constant forefoot stiffness (optionally substantially constant over a size run).

Ground-engaging components for articles of footwear include: (a) an outer perimeter boundary rim that at least partially defines an outer perimeter of the ground-engaging component, wherein the outer perimeter boundary rim defines an open space at least at a forefoot support area of the ground-engaging component; and (b) a matrix structure extending at least partially across the open space at least at the forefoot support area to define an open cellular construction with plural open cells in the open space at least at the forefoot support area. A plurality of these open cells of the open cellular construction have openings with curved perimeters and no distinct corners. Additional aspects of this invention relate to ground-engaging components that are very lightweight yet very stiff, particularly in the forefoot support area. Two or more sizes of the ground-engaging components may be provided with substantially constant forefoot stiffness (optionally substantially constant over a size run).