InventSports' drawstring bags are the only drawstring backpacks made from authentic sports materials. Whether you play a sport, watch it, or just love the uniqueness of our products and brand, it's easy to see why InventSports' bags are one of the hottest sports-related products in the market! Our bags are substantially superior to any other drawstring backpacks in durability and overall construction. Most drawstring backpacks are constructed of plain, thin nylon which does not wear well over time, rips easily, is easily punctured and puts your valuables inside at risk. InventSports' bags have a thick and absorbent inner lining, adding to their durability and stain-resistance.