Show off your science humor with this funny “I Wear This Shirt Periodically” design, featuring a colorful periodic table graphic that makes the joke instantly clear. It's a great choice for chemistry teachers, science students, lab workers, professors, STEM majors, and anyone who loves a smart pun. This tee works well for classroom days, science fairs, chemistry labs, back-to-school outfits, teacher appreciation gifts, birthdays, graduation, or casual everyday wear. The design is funny without being too loud, making it easy to wear for school, work, or weekend plans. Perfect for the person who loves periodic table jokes, chemistry puns, and nerdy science humor. Product features - 100% ring-spun cotton (lightweight 153 g/m²) for a soft, breathable feel - Tubular knit construction — no side seams for a smooth, clean silhouette - Ribbed collar with shoulder tape to retain shape and prevent stretching Care instructions - Do not dryclean - Do not bleach - Tumble dry: low heat - Iron, steam or dry: low heat - Machine wash: cold (max 30C or 90F), with similar colors