With a stripped-down outsole that delivers an ideal balance of grip, protection, and reduced weight, the inov-8® Road-X-TremeTM 220 running shoe is ready for race day! Predecessor: None. Support Type: Neutral. Cushioning: Minimal feel with extreme flexibility. Surface: Road. Differential: 4 mm. Standard Fit features a wider toe box to allow feet to splay. Highly-breathable mesh, textile, and synthetic upper materials. Lace-up closure. Slightly padded tongue and collar. Soft textile lining offers a great next-to-foot feel. Thin, removable foam insole. One Arrow Shock-ZoneTM design delivers high response. Injected EVA midsole. Rubber outsole. Dynamic Fascia BandTM (DFB) mimics the "Windlass Effect", transferring a jolt of energy with each step, promoting a faster, more efficient stride. Meta-FlexTM technology is anatomically aligned in front of the metatarsal heads for a natural forefoot flex. Product measurements were taken using size UK 10.5 (US Men's 11.5, US Women's 13), width Medium.