Fm-fermium-100

$36.00

Fun facts: Discovered in fallout from the first hydrogen bomb test. Extremely radioactive, to the point that it is observable only in tiny, short-lived amounts. Named for Enrico Fermi, pioneer of nuclear science and wearer of a solid mustache.

Great for: Atomic bomb historians, physics majors who want to flex, fans of FM radio (its symbol is Fm), and mustachioed individuals.

Keep it 100 with a Fermium atomic element hat from Lidnium. Atomic element #100. Crafted from premium washed cotton with precise Fm symbol embroidery and an adjustable fit, this cap lets you stand out—whether you’re celebrating a milestone or powering through your day. Wearing a Lidnium cap adds a little juice to your day, and Fermium takes it to the next level.