• Magic T-shirt that changes color with sunlight. • The detailed butterflies transform from black and pink to a rainbow of vibrant colors. • The colors change in a matter of seconds, even on cloudy days. • Made of 100% combed ring-spun cotton, offering a soft and comfortable feel. • Spectrachrome crystals reveal hidden colors when exposed to ultraviolet light. • Perfect for creating fun, joy, and memories under the sun since 1994. • Product dimensions: 1.7 cm wide, 0.5 cm high, and 1.5 cm long.