The Mobius X8 Wrist Brace incorporates the CCRS (Continuous Cable Routing System), Mobius' innovative patent pending technology, which provides maximum support across the wrist joint, allows more mobility and progressively resists hyperextension and minimizing the risk of injury to the ligaments and bones. The unique design dynamically changes the tension in the cable throughout the wrist's full range of motion preventing excessive bending (lateral and medial) and hyperextension. The tension adjustment dial achieves the desired support with ease and the degree of extension can be limited from 10-70 degrees with a simple adjustment screw. When an un-natural bending or hyperextension force is applied to the wrist the cable becomes progressively tighter, gripping the wrist and preventing the unwanted movement that can cause injury to the wrist's bones and ligaments. The innovative CCRS design crosses the wrist joint both longitudinally and transversely. The CCRS tightens and resists hyperextension just like the body's own ligaments. The tension in the CCRS progressively tightens keeping the wrist joint tight, resisting hyperextension and reinforcing the ligaments inside the wrist. The CCRS pulls the Metacarpal Shell, Tendon Back Shell, and Ulna Shell together preventing the brace from moving on the wrist. There is virtually no migration with the Mobius Brace. This new brace technology works so much better than conventional braces; you can actually feel the brace working. Fully lined with comfortable EVA foam. Unique palm-free design provides an uninhibited and unrestricted grip. Symmetrical design (no right or left). Includes optional Tendon Back Plate for a precise fit. Brace is sold individually. Sizing Guide: At the narrowest part of your wrist measure width as shown. Note: if the measurement falls between the two sizes, select the larger size.