The altura arc roll top pannier bag is a great all rounder and will always keep your content dry the roll top design is one of the most practical and one of the best to keep your possessions dry the arc roll top has been constructed from light weight and durable materials for long lasting great quality pannier with this arc roll top all of the seams are ultrasonic welded to ensure that the pannier is fully waterproof leaving the content always safe and dry thats not the only feature which m