Check the listing for details. PRO-TEC ATHLETICS J-LAT Knee Support Brace Patellar Subluxation. Color: Black, Condition: New. Listed at 49.95 USD. PRO-JLAT-SM-RTPurchasePrice16.07StorageLocation1PRO-JLAT-SM-LTPurchasePrice16.07StorageLocation1PRO-JLAT-MED-LTPurchasePrice16.07StorageLocation2PRO-JLAT-MED-RTPurchasePrice16.07StorageLocation2PRO-JLAT-LG-RTPurchasePrice16.07StorageLocation3PRO-JLAT-LG-LTPurchasePrice16.07StorageLocation3PRO-JLAT-XL-RTPurchasePrice16.07StorageLocation4PRO-JLAT-XL-LTPurchasePrice16.07StorageLocation4PRO-JLAT-2XL-RTPurchasePrice16.07StorageLocation5PRO-JLAT-2XL-LTPurchasePrice16.07StorageLocation5 --> J-LATERAL SUBLUXATION KNEE SUPPORT BY PRO-TEC ATHLETICS The Pro-tec Athletics J-Lat Knee Brace improves patellar tracking in cases of lateral patella subluxation and dislocation. The J-Lat Knee Support helps guide the patella back into proper alignment with gentle pressure from the lateral to medial direction. Compression surrounding the patella will help keep it in the patello-femoral groove. The J-Lat provides lateral tracking control by means of two elastic straps. These straps stretch over J shaped tubing and help guide patella into its proper femoral groove. SIZING: Circumference measured 3" above kneecap (choose right or left knee) SIZE MEASUREMENT IN INCHES SMALL 13 - 14.5 MEDIUM 14.5 - 16 LARGE 16 - 18 X-LARGE 18 - 20 2X-LARGE 20 - 22