Fr-francium-87

$36.00

Fun facts: One of the rarest and most radioactive elements on Earth. So unstable, its half-life is measured in minutes. Discovered in France in 1939 by Marguerite Perey, a student of Marie Curie.

Great for: Women in STEM, lovers of France, and people named Frank or Frances.

Harness the power of a Francium atomic element hat from Lidnium. Crafted from premium washed cotton with precise Fr 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 Francium takes it to the next level.