Ortlieb Saddle-Bag Seat Bag Description: The Ortlieb Saddle-Bag provides a practical means to expand the cargo capacity of any cyclist looking to add enough storage under their saddle for critical gear such as flat kits or smartphones. A direct attaching buckle design securely fastens to seat rails for quick, one-handed install and removal that adjusts to the profile and orientation of your seat and seat post. Features: Spacious waterproof saddle with roll closure and quick-release mount PU-coated nylon fabric forms resilient waterproof barrier Roll closure fixes to sides with buckles, leaving no protrusions inside Daisy chain exterior stores lights or compression straps Night time safety bolstered by Scotchlite reflector panels Fastening and attachment straps/buckles accommodate oversized 34.9mm seat posts Maximum load 2 kg/4 lbs. Note: Not intended for use with carbon-fiber seat rails Specifications: Pack Type: Saddlebag Pack Capacity: 4L Mount: Buckle & Hook & Loop Straps Waterproof: Yes Material: Polyurethane-coated Nylon Dimensions: 11 x 17.7 x 5.5" (17L) Color: Black Weight: 260g (4.1L)