Making a Nightguard with The ConfiDental Mouthguard Kit

The Rep at ConfiDental has contacted me numerous times to make sure that I molded the guard correctly and to make sure she answered any questions that I may have had. She was determined to make sure I had a positive outcome and promised to contact me the next day to make sure I had comfortable nights sleep. She did contact me the next day and I assured her the mold was fine and that I slept comfortably.
I inquired about the content of the plastic as I'm concerned about China using dangerous chemicals.
I was told: "Mouthguard is that it is made from ELVAX resin; this resin does not contain any BPA or phthalates."