The X-Fit® strap system securely wraps the leg with a comfortable overlapping hinge to increase stability. Double-sided support hinges with hyperextension stop and shock-absorbing base pads. The stability of hardened aluminum is securely fastened in Hypalon® sleeves. Anatomical improved and suitable anatomical design. Four-way elastic spandex at the back of the knee. High-quality seam assembly, patella support finish, and spandex [elastane] binding for long-lasting comfort. Convenient finger tabs provide an easy grip when installing. The N-Tex ™ air stream escaped from the moisture neoprene.