The Altura Sector 20 Dryline Pannier Bag has been specifically engineered for cyclists, giving extra visibility through Darkproof® Technology and waterproof Dryline™ Technology this pannier is the perfect performer for the daily commute. Altura Sector 20 Dryline Pannier Bag Features Waterproof patented Altura Dryline™ construction Altura Darkproof® Technology offers superior retroreflectivity KLICKfix™ Vario Pressure Fit Internal Bivi closure PE Board for back panel support Padded lid and base