Journal

Notes on cotton, on what goes into the clothes we wear every day, and on where it ends up.

White cotton underwear folded on linen

Health · 4 min read

Heat, Tight Underwear and Male Fertility: What the Research Says

Sperm production is unusually sensitive to heat, and tight underwear sits right next to where it happens. What the research says about fit, fabric and fertility, and what it doesn't.

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10 October 2026
Black cotton trunk in the dune grass, West Wittering

Health · 5 min read

Underwear and Testosterone: What We Actually Know

28 June 2026
Why Cotton Underwear Makes Sense for Men's Health

Health · 5 min read

Why Cotton Underwear Makes Sense for Men's Health

26 June 2026