A relatively new company in the minds of the general public, Mobius and the X8 have actually been worn and tested by Ryan Villopoto since late 2012 and now Ryan Dungey. Slipped on rather than strapped on, the innovative X8 is held in place by a continuous cable and backing plate system that wraps around the leg and provides natural but firm support. 
Tightened and released by a front dial, the system is extremely easy to put on and adjust throughout the day. Its overlapping joint provides no gap in coverage ensuring roost and the handlebar won’t make contact with your knee. The PIM glass filled nylon construction is very light (a little over 1lb each) and the sleek design makes gripping the bike very easy and comfortable. For the serious rider concerned about knee protection, the Mobius X8 knee brace should definitely be at the top of your list of ones to consider.
Injection Molded Shells
20% Glass Filled Nylon shells are designed to be flexible in places to allow the shells to conform to the user's leg for a better fit, comfort and stability, and designed to be rigid where necessary to resist excessive movement and provide impact resistance.
Forged Aluminum Parts
The Dial, Dial Fastener, Extension Stop, and Hinges are made of CNC Forged 6061 T-6 aluminium for maximum strength.
UHMWPE Cable
The cable is made with an Ultra High Molecular Weight Polyethylene Fiber. This material is being used in many advanced applications such as the aerospace industry and the military. It is the latest replacement material for Kevlar. It is known for its high tensile, bending and abrasion strength.
Tendon Back Plate
The Tendon Back Plate is uniquely designed to route the cable around the user's leg in strategic locations to reinforce the main ligaments of the knee. The Tendon Back Plate is made from a special flexible Kraton material designed to grip the user's leg and prevent migration.
Foam Padding
The Foam Padding is made from closed cell ethyl vinyl acetate (EVA) foam. The EVA foam pads are designed to conform to the user's unique leg shape providing maximum comfort and control while gripping the user's leg and preventing migration. Closed cell EVA Foam won’t absorb moisture (sweat), so they are odourless and easy to clean.
Straps
The velcro straps are designed to be comfortable and fully adjustable. Thermo Plastic Rubber (TPR) Pull Tabs are durable to make the straps easy to use and are numbered to prompt the user to tighten the straps in the correct order to ensure proper fit.
Continuous Cable Routing System
The CCRS (Continuous Cable Routing System) externally reinforces all of the cruciate ligaments. The continuous cable loop is twisted 180 degrees, or a half turn, to form two interconnecting loops. The CCRS cable is routed around the knee joint and when forces are applied to the knee joint, the CCRS becomes tight and resists the excessive movement that can cause injury to the ligaments. As the Continuous Cable Routing System tightens, it squeezes the brace shells gripping the tibia and femur. The tibial shell is designed to grip the tibial tuberosity controlling the lower leg, while simultaneously the femoral shell and tendon back plate grip the femur.
The CCRS cable is routed in such a way that when the leg is fully extended the continuous cable progressively tightens resisting hyperextension, bending, and rotation. When the leg is in flexion, the CCRS cable is designed to progressively tighten as well, preventing rotation and bending. CCRS (Continuous Cable Routing System) adjusts the fit with a single turn of the locking CNC for.

Mobius X8 Knee Braces key features:
GED 6061-T6 anodised aluminium dial
Plush moulded EVA foam and impact absorbing rubber internal padding
Overlapping patella area with zero degrees CNC forged 6061-T6 anodised aluminium stop leaves no gap exposed regardless of how far the knee is bent
Figure-8 cable and behind-the-knee adjustment pad greatly strengthen the joint yet work as freely as your body's own ligament system
CNC forged 6061-T6 anodised aluminium hinge plates
Lightweight PIM glass-filled nylon shell conforms to your legs shape, creating 360-degree protection that will not rotate or slip
Velcro® brand closure straps with TPR pull tabs numbered in order to provide proper fitment and easy entry and exit
Replaceable foam kit allows you to tailor the fit to each leg