Warmth dictates how fast your Temperature meter drops.
Armor and clothing are generally categorized into three tiers based on internal keywords:
– You cannot enchant “warmth” directly, but Fortify Health/Stamina Regen indirectly helps by letting you sprint/restore faster.
met a seasoned Nord scout who pointed out the obvious: metal conducts the cold; fur traps the heat. The scout laid out the gold standard for survival: