The Trek Interchange Grocery Bag is a medium-sized rear trunk pannier bag designed specifically for cycling enthusiasts. Made by the reputable brand Trek, this expandable bag comes in a sleek black color and features two pockets for added organization. Perfect for carrying groceries or other items while riding your bike, this bag is a practical and stylish accessory for any cycling adventure. Made in Vietnam, this high-quality rear trunk bag is a must-have for those who enjoy cycling and want to carry their essentials in style and safety.