Personalized Blue Octopus Yaya's Sweetheart T-Shirt. These cute and kawaii Octopus with "Yaya's Sweetheart" design apparel and gifts are perfect for any occasion. Octopus are a symbol of good luck in many cultures, and what better way to show your loved one how much you care than with this adorable and meaningful gift. 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.