Our dental coping sheet is made from thermoplastic polyurethane (TPU) material with ultra-high hardness while that of S brand is made from polyethylene terephthalate-1, 4-cyclohexane dimethyl ester (PETG). Our product shows superior performance in heat resistance, stain resistance, crack resistance, and stress retention. It hasa higher stress retention ratio, better tear resistance, and flexibility than PETG under thesame conditions.