We upgraded the original theft-resistant drawstring backpack to an even more secure sack. The Flak Sack II is made from our exclusive FLAKnit slash-proof fabric that achieves an A9 cut level, the highest there is! This lockable bag is like a portable safe for your valuables. 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. This bag doesn’t just carry your belongings, it protects them.