2021 Mantra: Just Be Nice. So, we went ahead and printed it on our mas muscle tank as a friendly reminder. When the day comes to rave- we're ready. We added this tee to our spring collection to celebrate good times and good spirits. Features an enlarged smiley face on front, and just be nice text on back. Two smiles are better than one: complete this look with our Just Be Nice Sweat short for the best of vibes. Fits true to size. Our muscle tees are designed with subtle shoulder padding to emphasize silhouette.