An article of footwear including a sole and having a low upper that is at least partially elastic, with an instep portion provided with an elastic tightening system extending from the top of the instep to the area of the sole. The elastic tightening system has a central portion extending over the top of the instep and a series of branches extending radially from the central portion to the area of the sole. Additionally, the elastic tightening system has a branch extending toward the heel on at least a lateral and medial side of the footwear article, and a branch extending toward the toes on at least a lateral and medial side of the footwear article.