Conceivably, you might pick up a pair of jeans returned by a previuos customer who went to the beach, but that is highly unlikely. We aren't gamblers by nature, but we would be willing to wager a small sum that the jeans in question were stonewashed. Stonewashed jeans are softened by rubbing against pumice stones during washing. Pumice is a soft white stone that is placed in huge washers along with jeans to be "stonewashed."
Pumice stones used in the stonewashing process sometimes disintegrate into tiny particles (or sand) that end up in the pockets of the jeans.
Obviously, pockets are the one portion of the jeans most susceptible to trapping loose pumice.
Any other sand would tend to get rinsed away with the wash water.http://www.atozbluejeans.com/
