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Dressing for over thirty degrees
Short answer: Over thirty degrees calls for clothes that take up moisture and let air through. Choose loose, light pi...
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What the drum's heat does to a knitted fabric
Short answer: Heat makes the fibres dry fast and contract, while the drum keeps them moving at the same time. Togethe...
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What heat does to elastane
Short answer: Heat makes the molecular chains in elastane move faster, and the hard segments that hold the elastic to...
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How to tell whether a layer is too warm
Short answer: The first signs come before you sweat. Your neck warms up, you feel like rolling up your sleeves, and y...
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Why sweat feels worse in humid air
Short answer: The body cools itself by evaporating sweat. If the air is already humid, it cannot take on more, and th...
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Warmth in a room with underfloor heating
Short answer: Underfloor heating warms from below. Your feet stay warm, the air at head height stays cool, and a bed ...
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Why a tight sock does not warm better
Short answer: A tight sock presses the air out of the fabric and squeezes the blood vessels in the foot at the same t...
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What happens to heat under a rucksack
Short answer: A backpack presses the fabric flat against the back. The air disappears, the insulation turns to nothin...
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Why sweat fabric warms more than T-shirt fabric
Short answer: Sweat fabric has an extra yarn that forms loops on the inside. The loops hold a layer of air against th...
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How the air in a knit becomes insulation
Short answer: The stitches of a knitted fabric form thousands of small spaces. The air in them cannot move freely, so...
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Why a loose garment warms less
Short answer: When there is too much room between fabric and skin, the air can move. Moving air carries heat away, an...
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How the layers work in practice on a cold morning
Short answer: Three layers solve the job on a cold morning. The inner layer is thin and moves moisture away from the ...
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