Dynamic Fit technology locks down the foot Engineered mesh provides targeted ventilation and support Dynamic Support system in the midsole provides a smooth transition Full inner mesh bootie wraps the foot to enhance breathability and provide a sock-like fit Notches on each side of the tongue allow for easy on and off Compression-mulded Phylon on the medial side and Cushlon foam on the lateral side are fused together to create a dual-density cushioning system Zoom Air unit in the forefoot delivers responsive, low-profile cushioning Honeycomb outsole pattern provides great multi-surface traction Weight: 10.4 oz/295 g (men's 10) Last: MR-10 Offset: 10 mm (12 mm forefoot / 22 mm heel) Lighter than ever, Nike Air Zoom Structure 21 Running Shoe gives you all the support you need. Updated with an engineered mesh upper that's stronger and lighter than before, this running shoe continues to cushion your stride with a dual-density midsole and midfoot system that provides locked-down support.
