Waterproof inner bagThe waterproof inner bag is already included in the contents of the delivery of the PRO Enduro strap reservoir bag. But if you need it you can buy another rain cover.Delivery content1 x Waterproof inner bagDetailsMaterial: Polyamide 210DSurface: with PU coating: blackTotal weight: ca. 0.1 kgTotal volume: 12.0-15.0 l