Thin cotton sweatshirt, soft and comfortable to wear all day.Cotton.Solid,bright color,you can DIY printing on your tshirt; Size only from 1T and 2T can open shoulder (with buttons), the other size can't open shoulder (without buttons).For 1T and 2T,buttons on the shoulder to make a bigger opening to get head through,makes it easier to get on and off. The tag is designed on the outside to reduce the irritation and friction on the baby’s skin and avoid damage to the baby’s skin. Unisex design, for all toddler babies and little boys or girls. Suitable for spring and autumn.Great for casual everyday, sports, running, jogging, home loungewear, school, gym exercise, athletic sports, outdoor activity, travel etc Package: 2 * Sweatshirt. Good stitching and well made, durable. Machine wash or hand wash, dry on low-temperatures.Please refer to the Size Chart in our Pictures before ordering.If your kids grow up faster,please choose one size up.