Dimensions: Overall width about 50 cm, pockets: each 34 x 17 x 30 cm (L x W x H), Volume about 30 litres. Large main compartments with snap closures, reinforced by plastic bottoms. Reflective tape and net at the back, carrying handle between the pockets. With recesses at the top for secure attachment to the luggage carrier. Includes associated rain cover. Material: Polyester.