Personalized Hot Air Balloon | I Love My Mimi | Grandson Granddaughter T-Shirt. This apparel is not just stylish but also a heartfelt expression of affection. It's a delightful way for grandsons and granddaughters to show their appreciation and create lasting memories with their Mimi. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.