Mass-Energy Equivalence Vintage Cotton Twill Cap with Golden Embroidery

One of physics’ most famous equations, worn without explanation. Mass-energy equivalence, E = mc², expresses the relationship between mass and energy and stands as one of the defining ideas of modern physics.

This low-profile vintage cap pairs that Expression with a washed cotton-twill finish and golden embroidery. A small NerdWear.net mark is embroidered on the back.

• 100% cotton twill
• 6-panel, unstructured, low-profile construction
• Curved visor
• 6 sewn eyelets
• Black sweatband
• Metal snap buckle with antique-brass finish
• Washed vintage effect
• One size, adjustable
• Front and back embroidery

NerdWear. Wear What You Know.

Made to order: Each NerdWear hat is produced specifically for your order using a pre-designed NerdWear Expression and predetermined embroidery specifications. Because your hat is embroidered on demand rather than pulled from mass-produced warehouse inventory, fulfillment may take a few extra days before it ships. Producing only what is ordered helps reduce excess inventory, waste, and unnecessary production costs, which helps us avoid passing those added expenses on to the buyer. Each hat is still produced to the design and specifications established for that product.