Shopping for Birthday clothes is tough enough, but finding the perfect outfit that looks cool and will make your kids actually want to wear it? That’s just a task no one should have to go through. So don't worry about all of those things- we got this covered here at Inkopious! These shirts are made from a durable cotton/poly blend fabric and won't weigh your little ones down while they're running around getting their thrill on. Sizing is failry true to size, but we recommend sizing up because we all know how fast the kiddos grow!