Whether you're training for your first race or are just getting back into a gym routine, the Nike® Flex 2016 RN will help keep you on stride. Predecessor: Flex 2015 RN.Support Type: Neutral to underpronation (supination).Cushioning: Lightweight, flexible response.Surface: Road.Differential: 8 mm.Breathable, flexible engineered mesh upper with thin, lightweight synthetic overlays. Fylwire integrated into the mid-foot and lacing system promotes adjustable lockdown.Lace-up closure. Lightly padded tongue and collar. Breathable fabric lining offers a great in-shoe feel. Thin, removable foam insole. Phylon midsole features two levels of cushioning to promote a smoother ride. Tri-star outsole pattern boosts flexibility. Rubber pods a the toe and heel deliver lasting traction and wear. Imported. Measurements: Weight: 7 ozProduct measurements were taken using size 8, width B - Medium. Please note that measurements may vary by size.