the.com/bike helmet
A foam crown that argues with pavement on your skull's behalf and usually wins.
crush physicsFoam crumples on impact, absorbing energy meant for your brain
single useOne serious crash and it's structurally done forever
hidden expiryFoam and glue degrade, so replace every few years
helmet hairThe vanity tax that millions refuse to pay daily
MIPS layerA slip-plane inside fights rotational brain injury