This Trek Bicycle Under Seat Bike Saddle Bag is a must-have for any avid cyclist. It provides convenient, on-the-go storage for all your cycling essentials. With a zipper closure and a collapsible design, this bag is made of durable nylon material and comes in a sleek black color. The bag offers one pocket and is positioned under the seat for easy access. It is 8" long, 5" wide, and 3" high, making it a perfect size for larger items. This saddle bag is suitable for cycling enthusiasts of all levels and is branded by Trek, a reputable company in the biking industry.