HZO-549 is a men's long sports tights from CW-X (シーダブリュー・エックス), a sports apparel brand of Wacoal. It is specifically the model number (product code) for the **Stabilyx Model**. It emphasizes the stability of the hip and knee joints, suppressing the body's core axis from swaying and supporting the calves. This is intended to maintain condition and reduce fatigue during long periods of exercise. It uses Coolmax material, which is absorbent and quick-drying.