Keep Mother Nature on her toes because you are ready for drizzle or shine in the Nike Free 5.5 Flash running shoe! ; A weather-ready version of the Free 5.0. ; Ideal for the neutral runner new to the natural-running-inspired category. ; Three-layer, abrasion mesh upper helps repel moisture, while Flywire cables wrap the mid-foot and arch for light, structural support. ; Flywire built into the laces adds an adaptive fit. ; No-sew upper design offers structural support without added bulk. ; WaterShield technology in the tongue helps protect the foot from the elements. ; Lace-up closure. ; Reflective hits boost visibility in low lighting. ; Lightly padded tongue and collar. ; Breathable fabric lining supplies a great in-shoe feel. ; Removable molded insole. ; Differential: 8 mm ; Hexagonal flex grooves provide six points of flexibility that allows the foot to move naturally in every direction. ; Segments of solid rubber under the toe delivers enhanced traction and durability right where it’s needed. ; Imported. Measurements: ; Weight: 10 oz ; Product measurements were taken using size 9, width B – Medium. Please note that measurements may vary by size.