Four-Bar Linkage — Escapement Tee

The four-bar linkage — crank, coupler, rocker, ground — the simplest closed mechanism, and the coupler curve it traces. The grammar of motion.

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.