Made a saddle bag for my touring bike! Designed around the Brooks but also fits on non-brooks rails. Trying it out on a short tour this weekend : r/bicycletouring
Brooks S/M/L Saddle Rain Cover | Trek Bikes
Brooks protective saddle cover - medium
Rain Cover
Saddle Cover Waterproof
Brooks Saddle Cover, Medium - Bike Touring News Store
Brooks Saddle Raincover black | Medium - Schindelhauer Bikes