The Brooks Flyer, based on the classic Brooks B17, is probably the ultimate comfort saddle for commuting, featuring suspension springs and designed specifically for long-distance hauls. It is a great choice for riders who like to sit upright on their bikes, with handlebars a fair bit higher than the saddle and most of the riders weight on the saddle.
The Flyer Saddle has a full compliment of springs underneath to take the sting out of bumps in the road. Leather, being a natural material, does require a bit of care. It is wise to cover it if you expect to leave it in the rain or snow. Depending on riding conditions, you'll want to treat the leather every 6 months to a year to keep it supple.
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