The Columbia Trek 24L is a durable and versatile shoulder bag made of polyester material, with a size suitable for adults of all ages. This backpack features a zip closure, one divider, and two pockets for organization. The bag is equipped with insect repellent treatment and a nylon frame, making it ideal for backpacking activities in the spring season. With an adjustable strap and outer pockets, this Columbia backpack offers both style and functionality for outdoor adventures. Additionally, the lifetime manufacturer warranty ensures long-lasting use for years to come.