Take your training to another level wearing the comfortable Nike Flex 2019 RN. Predecessor: Flex 2018 RN. Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Road. Differential: Not provided. Multi-direction stretch knit upper provides a snug fit. Synthetic overlays support the laces and provide additional structure. Lightly padded tongue and stretchy collar for a supportive wear. Soft fabric lining offers a great wear inside shoe. Removable foam insole. Dual-density foam midsole provides cushioning on every step. Heel strap stabilizes the back of the foot that allow natural movement. Flex grooves outsole helps deliver reliable traction. Imported. Measurements: Weight: 6 oz Product measurements were taken using size 7.5, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.