Patent attributes
An article of footwear is provided, including an upper having an acute angular opening in a vamp region, a base of the acute angular opening being disposed in a first region of the vamp proximate to a forefoot region of the article of footwear and an end of the acute angular opening being disposed in a second region of the vamp proximate to an ankle opening region of the article of footwear; and at least one lace having a length, including a first thickness in a center region of the lace length and a second thickness at each of the two end regions of the lace, and a change in thickness of the lace between the first thickness and the second thickness varying continuously and gradually along the length lace from the center region to each of the end regions.
