Sizes 4-8 in stock.
- 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 tractionLighter than ever, Nike Air Zoom Structure 21 Running Shoe gives you all the support you need.