The altura arc 15 roll top pannier has been constructed in a contoured design using lightweight durable fabrics altura39s arc welded panniers are a modern classic and these new roll top models ensure a completely waterproof seal combined with easy access this pannier has a 15l capacity making it perfect for every day use when you need to take more than just the essentials the lightweight pannier is suitable for a range of weather conditions as its waterproof welded construction