An article of footwear includes an upper having eyelets that define a lace pathway therebetween, a shoelace extending through the eyelets, a shell overlying the upper and defining openings over the lace pathway, and hooks coupled to the shell. The shoelace can be extended out through the openings to releasably engage with the hooks to tighten the upper.

A closure device including a beam, a catch at a distal end of the beam, a hinge connected to the beam, the hinge including a bi-stable spring and a shape memory element, and a controller connected to the shape memory element, the controller selectively delivering power to the shape memory element to change a state of the bi-stable spring.

A closure device including a beam, a catch at a distal end of the beam, a hinge connected to the beam, the hinge including a bi-stable spring and a shape memory element, and a controller connected to the shape memory element, the controller selectively delivering power to the shape memory element to change a state of the bi-stable spring.

An article of footwear includes an upper having a body with a first side and a second side, and a closure system for the upper. The closure system includes a first anchoring cable loop fixed at the first side, a flap, a flap cable loop, and a lace. The flap is fixed to the second side and extends across the body to a free end at the first side. The flap has an aperture extending through the flap. A flap cable loop extends from the free end. The flap cable loop is configured to extend from the free end through the first anchoring cable loop, and from the first anchoring cable loop back to the flap and through the aperture in the flap from an inner side to an outer side of the flap. A lace extends through the looped end of the flap cable at the outer side.

In one example, a ski boot includes a plastic shell, a boot liner partly received within the plastic shell, and the boot liner including a tongue having an upper edge, and a dynamic support strap. The dynamic support strap includes a band connected to the plastic shell, and a restraint element connected to the band, the restraint element including a wall and a lip that together define an undercut area behind the wall, and the undercut area is configured and arranged to receive a portion of the upper edge of the tongue when the restraint element is operably positioned with respect to the tongue.

In one example, a ski boot includes a plastic shell, a boot liner partly received within the plastic shell, and the boot liner including a tongue having an upper edge, and a dynamic support strap. The dynamic support strap includes a band connected to the plastic shell, and a restraint element connected to the band, the restraint element including a wall and a lip that together define an undercut area behind the wall, and the undercut area is configured and arranged to receive a portion of the upper edge of the tongue when the restraint element is operably positioned with respect to the tongue.

An article of footwear may include an upper configured to receive a foot of a wearer and a sole structure fixedly attached to the upper, the sole structure including a ground-contacting outer member and a removable midsole. The footwear may further include a motorized tensioning system including a power source, a control unit, a tensile member, and a motorized tightening device, the motorized tightening device being attached to an outer surface of the upper, and the tightening device being configured to apply tension in the tensile member to adjust the size of an internal void defined by the article of footwear. In addition, the power source and the control unit of the tensioning system may be configured to be removably disposed in the removable midsole.

An article of footwear may include an upper configured to receive a foot of a wearer and a sole structure fixedly attached to the upper, the sole structure including a ground-contacting outer member and a removable midsole. The footwear may further include a motorized tensioning system including a power source, a control unit, a tensile member, and a motorized tightening device, the motorized tightening device being attached to an outer surface of the upper, and the tightening device being configured to apply tension in the tensile member to adjust the size of an internal void defined by the article of footwear. In addition, the power source and the control unit of the tensioning system may be configured to be removably disposed in the removable midsole.

An article of footwear may include an upper configured to receive a foot of a wearer, the upper including one or more elastic portions and one or more substantially inelastic portions. The footwear may further include a plurality of lace receiving members fixedly attached to an outer surface of the upper on the inelastic portions of the upper. Also, the footwear may include a sole structure fixedly attached to the upper. In addition, the footwear may include a motorized tensioning system including, a motorized tightening device and a tensile member extending through the plurality of lace receiving members, the tightening device being configured to apply tension in the tensile member to adjust the size of an internal void defined by the article of footwear by drawing two or more of the plurality of lace receiving members closer to one another.

An article of footwear may include an upper configured to receive a foot of a wearer, the upper including one or more elastic portions and one or more substantially inelastic portions. The footwear may further include a plurality of lace receiving members fixedly attached to an outer surface of the upper on the inelastic portions of the upper. Also, the footwear may include a sole structure fixedly attached to the upper. In addition, the footwear may include a motorized tensioning system including, a motorized tightening device and a tensile member extending through the plurality of lace receiving members, the tightening device being configured to apply tension in the tensile member to adjust the size of an internal void defined by the article of footwear by drawing two or more of the plurality of lace receiving members closer to one another.