Personalized Groovy Only Good Vibes T-Shirt. Join the movement of good vibes and let your outfit reflect your positive energy. Get ready to turn heads and inspire smiles wherever you go! 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.