Topeak MTX Trunk Bag DX with Side Panniers Deluxe rear rack mounted storage bag ideal for commuting Two side panels with expandable panniers to maximize load capacity 1 divided main compartment; two side zippered compartments Dupont Teflon coating for water and stain resistance 14.1 by 9.8 by 8.5 - 11.4 inches (L x W x H); weighs 2.53 pounds