From Sinclair Patterns:
Fitted at the hips and loose through the leg, mid rise lounge pants in full or below the knee length. Offered in regular version with yoga waistband or regular ruched waistband or in maternity version with a special low rise waistline cut and contoured ruched waistband with side drawstrings (up to 35 weeks). Versatile pattern that can bring so many styles depending on your fabric choice such as pajama pants, lounging pants, workout pants, casual pants and many other. Very easy and quick to sew, perfect project for beginners.