Ergodyne® Open Patella Knee Sleeve Ergodyne Open Patella knee Sleeve supports muscles and tissues after suffering minor strains, sprains, injuries and some arthritis. Ambidextrous sleeve features dual layer anterior pad to provide exceptional support and comfort. Two lateral and two medial spiral stays support the knee from above, below and sides. Fasten the sleeve above and below the knee with 2" hook and loop closures to relieve painful irritated tissues. Machine washable.