Personalized Blue Octopus Mommy's Sweetheart T-Shirt. This kawaii Blue Octopus Mommy's Sweetheart design is perfect for your little one! They will love the cute octopus design, and you will love knowing that your child is wearing something that is mommy approved! This is made of high quality materials and is sure to be a hit with your little one. Order now and let your child show off their new item to their friends and family! 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.