Personalized Unity Day K is for Kindness Be Kind T-Shirt. Join the movement and wear your heart on your sleeve—literally! With our Unity Day K is for Kindness apparel, you can show your support for a world filled with love and positivity. Get ready to inspire others and make a difference, one kind act at a time! 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.