FOOT-HUGGING FLEXIBILITY. Made for short runs when you want a barefoot-like feel, the Nike Free Run 2018 feels super light and flexible. Its sock-like upper has more stretch yarns than previous versions, so it hugs your feet more than ever. The innovative sole has an updated construction, yet still expands and contracts with every movement. The packable design makes the shoe easy to stuff into your bag—so you can get in a few miles on the fly. Better Fit:This version of Flyknit has added stretch yarns for an even more snug, foot-hugging fit, especially in the heel. The upper is easy to collapse, so you can quickly slide the shoe into your tote or backpack. Breathability:Inspired by the Flyknit Racer, the Flyknit design features more open knit on the sides. This lets air flow freely to help keep your feet cool. Made With Less Waste:Nike Flyknit is precision-engineered with an average of 60% less waste than traditional footwear upper manufacturing. 10 million pounds of waste have been diverted from landfills since 2012, including over 600 million water bottles in the fabrication of Flyknit. All Natural Movement:The soft, lightweight sole mimics your foot's natural movement through its innovative pattern. It expands and contracts with every landing and push-off. This provides a natural feel and a barefoot-like sensation, kind of like an extension of your foot. Benefits:Rounded heel is made to roll with the ground as you stride Flywire technology woven into the upper integrates with the laces for a dynamic, supportive fit through the midfoot. Texture has been added under the toe and heel to enhance traction in these high-abrasion zones. Product Details:Weight: 5.55oz/157.4g (women's size 8). Offset: 8mm (14mm forefoot, 22mm heel). Style: 942839; Color: White/Black; Size: 7; Gender: Female; Age Group: Adult | Nike Free Run Flyknit 2018 Women's Running Shoes in Black, Size: 7 | 942839-101