Key features of a military tactical backpack include padded shoulder straps and adjustable waist belts for comfort during extended use. These backpacks often have a hydration reservoir pocket, reinforced stitching for added durability, and heavy-duty zippers for secure closure. They offer ample space for carrying essential gear such as ammo, tools, food, clothing, and other survival items, making them ideal for both military operations and outdoor activities like hiking, camping, and trekking.