about the only thing is to change positions like the others said. i have yet to sit more then 4hrs in my summit viper but those 4hr sits dont bother me at all. ill occassionally stand up. and the first hour of the day ill stand ready..and last hour "the golden hour" ill stand ready. but i never was uncomfortable yet. i like to keep my top seat portion kinda high so all my weights not being forced on my feet and legs and back. then if that gets a little uncomfy ill lower the top half a bit. just changing the position slightly..it helps. sitting on the ground i could never sit still long. that was always a killer..dont miss sitting on the cold wet uncomfortable ground!