The black Under Armour Tunnel Bag offers enough space to carry books, groceries, or, for example, gym slippers. This makes it ideal for travel, school, work, and even leisure activities, conveniently storing more than just valuables. The black color will add style to your entire outfit. The Under Armour backpack has a practical shape that offers plenty of space and comfort. The base is made of a high-quality material (100% polyester), which is strong and abrasion-resistant.