Mainly responsible for wholesale of glasses, TR90 is a polymer material with memory properties and is currently the most popular ultra light frame material internationally. It has the characteristics of super toughness, impact resistance, wear resistance, and low friction coefficient, which can effectively prevent damage to the eyes and face caused by frame breakage and friction during movement. Due to its unique molecular structure and excellent chemical resistance, it is not easily deformed in high temperature environments and can withstand high temperatures of 350 degrees Celsius in a short period of time. It is not easy to melt or burn.