Mueller Hg80 Knee brace is simply the most comforatble knee brace you will ever wear. Made of the distinctive HydraCinn Fabric which is a neoprene free, moisture-wicking material that provides a ''NO SWEAT'' and ''NO FUNGUS'' extremely comfortable knee support. Has an antimicrobial layer that provides protection from odor causing bacteria and fungus. Remarkably soft as well as lightweight with flatlock seams helps it to be one of the most comfortable braces you could ever wear. Inner gripping strips help hold the knee brace in place and helps prevent slipping. The inside sleeve includes a form fitting hourglass design. Flexible steel springs help support each side of your knee, but also allows for leg flexion and extension. Includes a mesh laundry bag to keep clothing from sticking to the hook & loop straps in gym bag or when washing machining. Black, Measure Around Center of Knee for correct sizing.