What fabric qualities matter most for soft-support athleisure?

Soft-support athleisure needs fabrics that combine soft handfeel, stretch recovery, opacity, light structure, and long-wear comfort. A fabric may feel soft at first touch but still fail if it stretches out quickly, becomes see-through, or cannot hold the waistband in place. For bras, the fabric should support gentle hold and coverage. For leggings or flare bottoms, it should balance flexibility, smooth surface feel, and reliable recovery after repeated wear.