The Nike Air Tech Challenge II QS of Men's Sport Shoes are an update to the original, which first hit the courts in 1990. Redesigned with a durable upper, this shoe has a Nike Air-Sole unit for superior cushioning and impact protection.ICONIC STYLE AND MAXIMUM CUSHIONINGSynthetic leather upper for comfort and durabilityPU midsole for lightweight cushioningVisible Air-Sole unit in the heel for maximum impact protectionRubber outsole with herringbone pattern for multi-surface traction and durability...The Nike Shoes more colors