GNC Introduces Temperature Control Technology Greg Norman Collection, a leader in golf-inspired sportswear, introduces a new innovative concept called TCT, Temperature Control Technology. "Considered the advancement to our widely popular ML50 polo, TCT is something fresh that will bring much-needed excitement to the market," says Jeremy Brandrick, Senior Director of Design. "Reacting to either cool or warm the body, the technology maintains the body's temperature at 98.6 degrees for a cutting-edge regulation system." 
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