Catenary — The Hanging Curve Tee

Hang a chain from two points and it settles into a catenary — y = a·cosh(x/a). Invert it and you have the strongest arch. One curve, drawn honestly.

Cold wash inside out, hang dry — durability shows in washes, not adjectives. Printed on a Comfort Colors heavyweight tee with a soft, broken-in feel.

Buying it as a gift? To an engineer it's a piece they'll actually recognize; to everyone else it's simply a clean, well-made shirt. Questions? A real person reads care@lunthra.com.