This Shirt Is Blue If You Run Fast Enough Blueshift T-Shirt

Get our ultimate lab joke t-shirt and challenge others with running fast enough ( at least 10% the speed of light...) to activate the Doppler effect in the electromagnetic spectrum and cause our wonderful red shirt to turn blue! If you're a cosmos geek and want to confuse your friends this t-shirt is perfect for you, only available in red unless you can run fast enough!

Our shirt is blue unless you run fast enough doppler effect t-shirt is made with soft and lightweight material, with just the right amount of stretch. It's comfortable and flattering for both men and women, made with 100% cotton making it perfect for the summer.

• 100% combed and ring-spun cotton
• Fabric weight: 4.2 oz (142 g/m2)
• Shoulder-to-shoulder taping
• Side-seamed

Made using DTG printing for a more quality finish, using more eco-friendly inks directly printed into the fabrics giving a softer feel with guaranteed lasting power after repeated washes.