Personalized Cupcake First Birthday Toddler T-Shirt. Our 1st birthday outfit for boys is the perfect choice for your little man's special day. With a stylish design and soft fabric, this outfit will keep him looking and feeling great throughout the birthday celebration. Whether it's a cake smash photoshoot or a birthday party, this outfit is sure to impress. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.