A knee ligament support device comprising a lower portion, an upper portion, a rigid stabilizer member coupled to the lower portion and the upper portion, and an antimicrobial coating. The lower portion is configured to surround a portion of a leg below a knee. The upper portion is configured to surround a portion of the leg above the knee. The rigid stabilizer member is configured to stabilize movement of the knee. The rigid stabilizer member has an exterior surface. The antimicrobial coating is applied to the exterior surface of rigid stabilizer member. The antimicrobial coating includes a silane quaternary ammonium ion or salt thereof. The antimicrobial coating is applied to the exterior surface of the rigid stabilizer member as a solution including the silane quaternary ammonium ion or salt thereof and a solvent. The solvent can be isopropyl alcohol.
