The Breakthru 4 has an engineered mesh upper for a dynamically created fit. This shoe has a no-nonsense underfoot feel paired with EVERUN to tackle all your training needs. Whether it's track day or back day, go earn your breakthrough. Overview ? Successor to the Breakthru 3 ? Newly added EVERUN Topsole construction for enhanced energy return and continuous cushioning throughout the run ? Engineered mesh upper for a lightweight, dynamic fit ? Molded heel support Specs ? Shoe Category: Neutral ? Pronation: Neutral ? Cushion: Responsive ? Construction Type: Neutral ? Surface: Road, Track ? Arch: High, Normal (Mid) ? Water Resistant: No ? Waterproof: No ? Offset: 8mm ? Heel Stack Height: 25mm ? Forefoot Stack Height: 17mm ? Weight: 7.4 oz. | 210 g.