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 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 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.

A shoe includes a sole and an upper attached to the sole, in which the upper includes an upper main body that covers the forefoot portion, a portion of the midfoot portion, and the heel portion of the wearer, and a tongue that covers a portion of the midfoot portion, the tongue is connected to the upper main body in a front end portion or in the front end portion and portions of side portions, and the front end portion of the tongue is located such that the path length from a rear end portion of the shoe is a range of 35% or more and 50% or less based on a center line passing from the rear end portion to a front end portion of the shoe.

A shoe includes a sole and an upper attached to the sole, in which the upper includes an upper main body that covers the forefoot portion, a portion of the midfoot portion, and the heel portion of the wearer, and a tongue that covers a portion of the midfoot portion, the tongue is connected to the upper main body in a front end portion or in the front end portion and portions of side portions, and the front end portion of the tongue is located such that the path length from a rear end portion of the shoe is a range of 35% or more and 50% or less based on a center line passing from the rear end portion to a front end portion of the shoe.

A fastening device includes a case unit including a receiving space, a spool located within the receiving space and configured for a lace to be wound therearound, and a knob covering on the case unit. The knob includes a main body made of a composite material, and a shield cover covering on the main body and made of a metal material. A rotation of the knob drives the spool to rotate in a tightening direction for tensioning the lace.

A fastening device includes a case unit including a receiving space, a spool located within the receiving space and configured for a lace to be wound therearound, and a knob covering on the case unit. The knob includes a main body made of a composite material, and a shield cover covering on the main body and made of a metal material. A rotation of the knob drives the spool to rotate in a tightening direction for tensioning the lace.