Tomtoc DefenderACE-A04 16" Laptop Shoulder Bag | Gray: Sturdy Durability: up to military standards Amazing durability and sturdiness are provided by the waterproof YKK zippers and buckles found in CORDURA ballistic nylon. The sturdy materials will withstand abrasion and tearing, providing a guaranteed long-term use. 4 CornerArmor Defense. Top brand