Birthday Behavior Tee — "Warning: Birthday Behavior in Progress" Party T‑Shirt

Celebrate the wild, loud, and gleeful moments with a tee made for birthday mischief. This classic cotton shirt carries a colorful, playful design that reads “Warning: Birthday Behavior in Progress” surrounded by balloons, confetti, cakes, and confetti — a look that announces celebration before you even speak. It sits relaxed on the shoulders, breathes easily, and keeps its shape after many wears and washes. Wear it to backyard parties, late-night bar runs, or casual family dinners when you want to keep the mood light and the photos memorable. The bright print pops on the clean white canvas of the shirt, making every laugh and candle-blow photo-worthy.

Designed for people who lean into fun: those who plan themed parties, organize pub crawls, or simply love adding a splash of humor to their birthday. The medium-weight fabric and classic crew neck make it comfortable under a jacket or on its own, while the tear-away label keeps you itch-free during all-day festivities. It’s made with ethically sourced cotton and certified safety standards, so you can feel good about wearing it while you celebrate.

Slip it on, cue the music, and let the shirt do the talking — this one’s made to match the energy of the night.

Product features
- 100% cotton solid colors with medium-weight 180 g/m² fabric for breathable, durable wear
- Tubular knit and no side seams reduce waste and create a smooth silhouette
- Ribbed collar and shoulder tape preserve shape and prevent stretching
- Dual printing: DTF for sleeve/neck details and DTG for main artwork ensures crisp, vibrant design
- OEKO-TEX certified; tear-away label and EU 2-year warranty; ethically sourced US cotton

Care instructions
- Non-chlorine: bleach as needed
- Do not iron
- Do not dryclean
- Machine wash: cold (max 30C or 90F)
- Tumble dry: low heat