The largest of the altura arc range the altura arc 40 roll top panniers offer a whopping 40 litres of capacity per pair so there39s plenty of room for everything you need if you39re going on an epic ride constructed in a contoured design using lightweight yet durable fabric this roll top pannier is a modern classic great for all round use this pannier is lightweight as well as durable suitable for a range of weather conditions it will keep your kit dry thanks to water