A Pavlik harness is a piece of equipment, splint, or brace used commonly for babies with hip dysplasia. The Pavlik harness helps the hips and knees remain bent while the thighs spread apart. A Pavlik harness is indicated for infants with hip dysplasia in their first six months of life. They sometimes use the Pavlik harness when there is a fracture of the femur. Hence, you can use the Pavlik harness with a child sling if they have diagnosed the baby with hip dysplasia or are at a risk of hip dysplasia.