Personalized Positive Vibes Be Your Best T-Shirt. Wear it with pride and inspire others to join the positivity movement. Get yours today and let your style reflect your positive attitude! 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.