Personalized Happy Birthday with Dog and Mouse Youth Hoodie Sweatshirt. Dog and Mouse are excited to wish you the happiest of birthdays! Happy Birthday with Dog and Mouse Youth Hoodie Sweatshirt - Black, perfect for those who love this friendly duo from "Dog and Mouse" by Michelle Nelson-Schmidt. This youth pullover fleece hoodie delivers reliable all-season comfort with a durable cotton-poly blend that keeps kids warm and ready for anything. Crafted in 7.5 oz, 60% cotton / 40% polyester fleece, it features a jersey-lined double-needle hem hood, topstitched neck, and coverstitched shoulders and armholes for added structure. With ribbed cuffs and bottom band, a front pouch pocket, and side-seam construction, this hoodie is built for everyday wear, vibrant school days, weekend outings, or layered looks. Machine washable and made to stand up to repeated wear and washes.