Rocket Factory PARTICLE PHYSICS GIVES ME A HADRON Men's T-shirt We only use the softest, 100% pre-shrunk cotton tees for exceptional comfort and quality. The graphics are printed professionally by hand and carefully inspected each time to ensure a print that will look great for years. All our designs are printed in Montreal, Quebec and heat pressed in house, which means the shirt is ready to wear immediately upon arrival at your door. We sew an original Rocket Factory tag onto the hem of each of our shirts, so you know you're not being short changed by imitators.