The Flak Sack by the Loctote Industrial Bag Co. is the toughest drawstring backpack ever. Made with a double layer of heavy-duty slash-resistant fabric, this lockable bag is like a portable safe for your valuables. It was designed to accommodate the lifestyles of people on the go who need their essentials with them, but are not able to be constantly looking after them. Simply lock the bag closed or to any secure object – and leave it without worrying about it being tampered with or stolen. This bag doesn’t just carry your belongings, it protects them.