Each one of these Piggy Back bags keeps 3 plastic bottles out of the landfill! Our new Heavyweight Poly material contains 100% post-consumer recycled materials (RPET). This eco-friendly utility fabric has a heavier hand feel, is more durable, and is made consciously. This means you don't have to sacrifice style for functionality. Need a no-fluff, on-the-go, classic bag for your stuff? Our 4CP RPET Piggy Back drawstring backpack does it all.