A new, more compressive NIKE flyknit construction in the shoe upper secures the runner’s foot to the shoe platform. The unique zoned performance mapping pattern of the NIKE flyknit upper is derived from insights on how pressure is exerted on the top of the foot. NIKE sport research lab scientists employed pressure-mapping technology to locate stress areas, and designers used the data to inform the new upper. Zones on the top of the foot have engineered stretch built to enable natural flex, while a tighter weave at the perimeter stabilizes the forefoot and heel. Additionally, elasticized construction fits securely around the ankle for a comfortable, secure fit. By knitting a one-piece upper, NIKE flyknit construction reduces NIKE’s typical upper waste by an average of 88 percent.