Personalized I Believe In Santa Toddler T-Shirt. Cute Christmas Toddler T-Shirt - Heather and Royal with Santa Claus cap says I BELIEVE IN SANTA JUST BECLAUSE. For anyone who still believes, just because. 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.