Os-osmium-76

Fun facts: Has the highest density of any naturally occurring element—so heavy, they say it almost feels fake in your hand. Used in fountain pen tips, electrical contacts, and alloys. Deadly in high doses. Great for: Fans of the heaviest metal (literally) and pen snobs. Rock the style of an Osmium atomic element hat from Lidnium. Crafted from premium washed cotton with precise Os 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 Osmium takes it to the next level.