 Vintage Dad Hat — a clever nod to quantum mechanics with a washed-out, well-worn look that keeps things cool, casual, and just a little bit nerdy.

This hat isn’t just a conversation starter — it’s a vibe.

Tap into humor and intellect with the &quot;Shift Happens&quot; Vintage Dad Hat — a clever nod to quantum mechanics with a washed-out, well-worn look that keeps things cool, casual, and just a little bit nerdy.This hat isn’t just a conversation starter — it’s a vibe.<ul class="tiptap-ul"><li class="tiptap-li">Embroidered quote: “Shift Happens — That’s Quantum Mechanics”</li><li class="tiptap-li">100% cotton twill</li><li class="tiptap-li">6-panel unstructured cap with a low profile</li><li class="tiptap-li">Adjustable strap with antique brass buckle</li><li class="tiptap-li">Black sweatband for comfort</li><li class="tiptap-li">Vintage, lived-in wash</li><li class="tiptap-li">One size fits most</li><li class="tiptap-li">Designed for thinkers, tinkerers, and laid-back geniuses</li></ul>