Flared leggings work because the wide hem balances the fitted waist and thigh — the same reason bootcut jeans have outlasted every trend. It's a more forgiving line than a straight legging, and it reads as an outfit rather than gym kit.
The high waistband holds through squats, twists, and floor work instead of rolling down, and the fabric stays opaque under stretch. The matching bra completes the set for a coordinated look that doesn't need a cover-up to leave the house in.
Suited to yoga, Pilates, barre, or wearing straight out to run errands. Soft enough for a rest day, structured enough for a real class.