Style#: DM8199-064 Molded cage enhances support and stability. Rubber outsole gives you traction on hard-court surfaces. The Zoom Air unit provides lightweight cushioning. Pull tab on the heel for easy entry. A durable design crafted for hard-court surfaces, the HyperAce 2 has a Zoom Air unit for lightweight cushioning and a molded cage that conforms to your foot for a supportive fit and feel.