The altura briefcase rain cover has a waterproof construction to protect your pannier from the rain this rain cover is the perfect accessory for the wet days as it39ll guarantee to keep your briefcase pannier and all its contents dry the altura rain cover is quick and simple to fit and you can easily store it inside your briefcase so you39re prepared for any forecast showers finally the altura briefcase rain cover has a reflective trim to ensure you39re more visible to other road us