Brooks Rain Cover protects your Leather Saddle from moisture. If a wet saddle is ridden not only the colour may stain your clothing, but the leather top may easily deform.
The Rain Cover is available in 2 sizes:
The medium size is for all road, mtb, trekking and touring saddles (Team Pro, B17,...)
The large size is for all city, transport and heavy duty saddles (B66, B33,...)