Some tees are plain, others are not. This American Apparel Unisex Thermochromatic Sheer Jersey T-Shirt ($34), is a far cry from plain Jane. Through the magical world of science, this tee will change different colors according to your body temperature. How fun!

The semisheer fabric is great for the warm weather and the price is nice; I think I'll take two. Didn't I tell you hypercolor is back?