The UltraBOOST X running shoe is women-specific in design for the ultimate in responsiveness. ; Predecessor: None. ; Support Type: Neutral. ; Cushioning: Lightweight, flexible response. ; Surface: Road. ; Differential: 9.5mm ; Primeknit textile upper wraps the foot for a snug, adaptive fit. ; Structurally-supportive synthetic mid-foot cage. ; Lace-up closure. ; Dual-density 3D heel counter designed for women's feet helps increase stability around the heel and allows for optimal movement of the Achilles. ; Bootie construction supplies a snug, sock-like fit. ; Smooth textile lining. ; Molded foam insole. ; Ultracushioned boost midsole is optimized for a responsive ride. ; TORSION SYSTEM, placed between the heel and forefoot, helps promote a more stable ride. ; Continental rubber outsole delivers reliable grip over wet and dry surfaces. ; STRETCHWEB rubber in the outsole flexes for increased energy underfoot. ; Imported. Measurements: ; Weight: 8 oz ; Product measurements were taken using size 8, width B - Medium. Please note that measurements may vary by size. ; Weight of footwear is based on a single item, not a pair.