Three words, repeated until they stick: you belong here. On the back, a letter to whoever is walking behind you — the world is a better place with you in it, someone needs you here, you are enough exactly as you are, you matter. Signed, the person in front of you. It turns an ordinary day in line, on a train, in a waiting room into the moment a stranger needed. You may never know who reads it. Wear it anyway. Someone behind you needs those words today.