... high tech plastic 2)Adjustable design, easy to assemble 3)Testing by TUV, CE, Rohs back brace posture support Europe Patent: ... warranty under normal use with manufacturer100% satisfaction guaranteeMagic Back Support helps to:Relieve fatigue and pain in shoulder ... circulation and alleviate insomniaThe TUV test reportHow to use back support?Adjustable to 3 different levels for optimum stretching, it ...