Salt and Light unisex t-shirts are a reminder that we are both the salt of the earth, and the light of the world.
"You are the salt of the earth; but if the salt has become tasteless, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled underfoot by men. You are the light of the world. A city set on a hill cannot be hidden;" Matthew 5:13-15 NASB.