1) Flexible straps that will not bind or "dig" into skin
2) Dual axis hinges for medial and lateral stability
3) Component parts allowing full range of motion without compromising stability or support.
4) Popliteal opening to prevent bunching and discomfort behind knee
Medical Applications according to the manufacturer : Effective, form fitting support for patellar tracking issues, moderate ligament and meniscus tears, overall knee joint stability and hyperextension.
Size chart as suggested by manufacturer : circumference measured 3" above top of kneecap
Regular Up to 19"
X-Large 19-24"
XX-Large 25-30"