The AM90 QS is a classic sneaker from AM line. The QS stands for "Quickstrike," which means that the sneaker is released in limited quantities and often has unique colorways or materials. The AM90 QS features a visible AM unit in the heel for cushioning, a leather and mesh upper for breathability, and a rubber outsole for traction. The AM90 has been popular since its initial release in 1990, and has been re-released in various colorways and collaborations over the years. It is a versatile sneaker that can be worn for both athletic activities and casual wear.