Personalized 100 Days Of School 100 Days of Cool Baby Sweatshirt. This Happy 100 days of school design is the perfect outfit for kids looking to celebrate their 100th day of school in style. With its cute design, it is sure to make your little one stand out. Whether it's for a boy or a girl, this outfit is a great choice. Keep your little one warm and comfortable with this soft infant crew fleece sweatshirt. Made from a cozy cotton poly blend, this pullover offers just the right amount of warmth for cooler days without feeling bulky. The snap-tape neck closure makes dressing quick and easy, and the ribbed collar, cuffs, and hem provide a secure fit that moves with your baby. Durable stitching and side-seam construction help the sweatshirt maintain its shape and softness through repeated washing. Great for everyday wear, daycare, playtime, or layering during fall and winter, this fleece sweatshirt is a practical and comfortable essential for any baby wardrobe.