Optimum No Rinse, its primarily a substitute for washing your car when you don't have enough water or is short on water supply, its a formula that basically removes dirt and makes it heavy enough to be wringed out when you dip it again in the water, the formula is fortified with polymers that makes the paint clean and makes it shine, its good enough to the point where it can be used as 4 different products, 3 different uses though, and as i've stated it can be used as a QD, rinseless or waterless wash, and clay lubricant.