The Cannondale Contain Welded QR Bag offers simple and effective solutions to store your essential items safely and easily.Cannondale Contain Welded QR Bag FeaturesWater resistant Welded PU Nylon constructionWaterproof zippersVelcro attachment to the seat post and T-bar to the underseatReflective light clipInner pocketCapacity: 1.7 liters