The Custom Drawstring Backpack is an essential part of our Drawstring Backpack offerings.To clean a polyester drawstring bag, empty it and shake out debris, then spot-treat stains with mild soap and a soft brush. For best results, hand wash in lukewarm water with a mild detergent, rinse thoroughly, and air dry in a ventilated place. If machine washing, turn the bag inside out, use a mesh laundry bag on a gentle, cold cycle, and avoid bleach or direct heat.