Mt-meitnerium-109

Fun facts: Superheavy. First made in 1982 by bombarding Bismuth with Iron ions. Named for Lise Meitner, co-discoverer of nuclear fission. No practical uses—just a peak achievement in element hunting. Great for: Montanans (Mt), mountain climbers, anyone named Matt, and fans of reaching new heights. Unleash the spirit of a Meitnerium atomic element hat from Lidnium. Crafted from premium washed cotton with precise Mt 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 Meitnerium takes it to the next level.