Personalized Construction 2nd Birthday T-Shirt. The vibrant and playful designs are sure to bring a smile to his face and make his birthday celebration even more memorable. Let him show off his love for trucks and construction with our stylish and comfortable clothing. 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.