Open knee design for added comfort around the patella Exclusive 5-needle stitch for a flatter, cleaner and stronger seam Seamless back-of-knee and anatomical design for added comfort Latex-free neoprene provides thermal/compression therapy Outer heavy-duty nylon fabric for durability Fits left or right  Fabric: 100% latex free 3.2mm neoprene (CR) - exclusive of binding/cover fabric. NOTE: Not a substitute for medical care. Always consult a doctor for injury diagnosis and treatment.  Product Name: Mc David Neoprene Knee Sleeve with Open Patella Mc David Code: 402R-BK Option: Small, Medium, Large, X-Large