Shadow Shifter ADULT Men's/Unisex Color Changing T-Shirt Heat Sensitive Color Shifting Heat and water activated color changing UNISEX t-shirt. WE ADVISE MEN TO GO ONE SIZE UP FOR A LOOSE FIT. Machine washable and dryable. Improved color shifting technology from Global Hypercolor days. Made in the U.S.A. You don't need the sun to have color changing fun when you're wearing Shadow Shifter