The Columbia Diaper Bottle Baby Bag Crossbody in Blue is a large 18-inch unisex baby diaper bag made from synthetic material. It features multiple pockets including inner pockets, an insulated bottle pocket, outer pockets, a flap, and a clip for keys. The bag also has an adjustable strap and a zipper closure. With its solid blue color and messenger look, this Columbia baby bag is both stylish and practical for parents on-the-go.