These cotton-rich joggers are specially designed to be worn with a hip dysplasia or Pavlik harness. Snap fastenings run along the edges for easy dressing. Printed care labels and flat seams reduce irritation, and added stretch makes them super-comfortable. Size 6-9 months. I found these worked well from 4-5 months (13-15 lbs) given the size of the harness. In gently used condition without tears or stains.