STEM] Uniqlo's HeatTech is not the best? How thermal underwear

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The Consumer Council has put 20 different types of thermal wear to test, turns out the cheaper options can be more give you more warmth! Before delving into Consumer Council's report, let's take a look at how thermals work. 💦Thermals Explained - the STEM Way How heat functions? Our bodies lose heat in a few ways: 1) conduction (heat is transferred from a warmer solid object to a cooler solid object; this is the second law of thermodynamics), 2) convection (heat is transferred from your body to a liquid or gas) and 3) evaporative cooling (the process of a liquid changing state into a gas takes energy, in the form of heat, from its surroundings). Although thermal wears provide some insulation (conduction and convection), their main job is to fight evaporative cooling. A quick example of evaporative cooling: blow across the back of your hand, lick it, and blow