The “Water Saver” design is based on the fact that it takes 400 gallons of water to grow enough cotton for just one new t-shirt. By purchasing one of our ReUse shirts instead of a new one, you are helping save that 400 gallons of water for other more important uses (drinking, food crops, etc). UPDATE! We've reached our original goal to help save 36,500 gallons of water with the Water Saver Series of ReUse shirts! This is the amount of water that 200 people should drink in a year! Order one of the Water Saver shirts here.