Come and see our amazing products. Our sports draw string back pack bags are made of high-density polyester fabric which is lightweight but thick and sturdy, and the sewing is also very strong, so these athletic drawstring backpacks are withstood daily wear and tear and not easy to damage. Besides that, the straps of our bulk gym string bag pack are heavy duty, and the string knot areas are particularly reinforced, so it is quite strong. We can rush service and the price includes shipping cost to ca. QTY for 5000pcs and over by ocean. Pls confirm with us about the packing info, stock color and exact production time before placing your order.