High quality knit Elastic Knee Sleeves are available in a variety of styles. Elastic Pull-Over Sleeve provides basic knee support with either open or closed patella. Elastic Knee Sleeve with Stays gives additional medial and lateral supports with two spiral stays on each side, and is also available with open or closed patella. Knee Support with Silicone Buttress combines the features of the Elastic Knee Sleeve with Stays,but adds a silicone buttress for control of patellar mal-allignment and chondromalacia.