The Custom Defiance and Defiance III is DonJoy's hallmark knee brace. Combining the ultimate in technology, materials and design, this lightweight brace provides durable support for moderate to severe ACL, PCL, MCL and LCL instabilities. Plus, the low-profile design fits comfortably underneath clothing and sports uniforms, including hockey and football. As the strongest of DonJoy's functional braces, the custom, carbon composite Defiance is recommended for high collision sports, while its featherweight materials and custom fit also make it the brace of choice for activities of daily living. Available in three lengths: standard, short and standard thigh with short calf.