Personalized Valentines Day Be Mine T-Shirt. Our Valentines Day Be Mine design features a beautiful combination of vibrant colors and romantic elements. The design showcases a heart-shaped motif with the words "Be Mine" written in elegant typography. It is a timeless symbol of love and devotion that will surely melt their heart. 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.