The HUMVEE Double Reinforced Day Pack features polyester/nylon fabric, double reinforced stitching, reinforced carry/drag handles and water repellent construction. External compression straps. HUMVEE has become the backbone of U.S. forces around the world. Our HUMVEE gear is modeled after equipment that is depended on in the rigors of battle. These products are designed to survive the most demanding situations while still remaining simple and easy to use.