Inspired by the fact that the number 3 is equal to the sum of the numbers below it, Jak's G3 sneakers combine three materials to create a simple yet striking upper. Rubberized leather, nubuck, and mesh are used to create the upper, with fins rising up either side for a more secure fit. On the interior are calf leather lining, a full leather midsole, and removable shock-proof innersoles. Designed and handcrafted in Portugal, they're finished with natural cotton laces and a cemented and stitched rubber sole.