Om is a letter, a sound, a symbol, an idea, and a prayer. Its ancient curves symbolize the waking state, dream state, and deep sleep state of consciousness. Its sound is a primal vibration that encompass all sounds at once.
The mantra, "om mani padme hum" is believed by Buddhists and Hindus to bring good fortune to those who send its words toward the heavens. Repeat these words to yourself if you are a believer and they will help you find peace.
To wear the Om sweet om tank top is to remind yourself and others that you are a part of the collective wholeness of humanity. You are kind, compassionate, and forgiving. Om is where you are most at home. Om is a place where others are always welcome.