Now I have, so I have both drums tested no knee injury as Healthy. They stay in place and do not slip. You can lock the bandages by a really wide Velcro. Front the bandage is well padded and does not press on the kneecap. The bandages are well stitched and meticulously crafted. A border cases the fabric and protects against wear.
They are ideal for a runner's knee and patellar instability. They relieve the patella tendon. They give protection when jogging or walking. Recommended.