Personalized It's My Birthday Groovy Daisy Design T-Shirt. Looking for a fun and eye-catching way to celebrate? This design is an excellent choice. Its high-quality print and vibrant message make it a memorable piece to wear all day long while you enjoy your birthday festivities. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.