It is the best stock seat I've had on a bike. I don't know how it is made, but it feels like a gel seat. Nice and wide with plenty of support. Almost as nice as a Miustang seat I had on another bike. The stock seat is also covered with a good, soft leather cover. I think you'll like it.
Which bike are you thinking about?
The Voyager is my first really big bike, but I really like the fit. I'm 5-11, 186lbs, and I do not feel cramped at all (I did feel cramped on the Harley Ultra Classic). Usually the factory setting for the handlebars on bikes is too low for me, so I loosened the riser clamps and rotated the bars up just a little (to where it does not hit the fairing at full turn). It feels just right, and no need for taller risers.