TEI-1 = Engineered for lightweight active pursuits
TEI-2 = Ultimate comfort versatile and core warmth
TEI-3 = Fundamental warmth fashioned for life
TEI-4 = Arctic inspired for enduring daily warmth
TEI-5 = Field tested for coldest places on Earth
The Thermal Experience Index (TEI) is a guideline provided to help you select the right Canada Goose jacket for your particular need, because everybody experiences temperature differently.