These knee braces get their name from the fluidity with which they operate.
These things are buttery smooth. The Fluid Tech carbon version is sold
individually and constructed using a carbon polymer compound that makes this
brace 40% lighter that than current B2 brace versions. This brace comes in two
size ranges and features Alpinestars’ SAS or Size Adapter System. The first
covers sizes S-L and the other covers XL-2XL. The brace comes with leg- size
adjustment spacers in 1, 2, and 3mm plus two pairs of ergo fit spacers in 6 and
9mm. The dual hinge pivot features this extension stop system that limits knee
extension based on which stopper you choose. Stops from 0-20 degrees are
included. The brace panels are backed with comfortable Polyurethane memory foam
and the X-Strap system combines these pressure release buckles with Velcro for
easy on and off and adjustability.
The Fluid Pro knee braces have the same design and construction as the Fluid
Techs save two main features. The Pro version is made of a high performance
glass fiber material. While it is not quite as lightweight as the carbon
version, it is still 25% lighter than the previous B2 braces and performs at
temperatures as low as -4 degrees Fahrenheit. The other main difference is the
admits to making these Pro braces almost too good for the money. The Fluid Pros
are sold in pairs for just a small amount more money than a single carbon unit.