The majority of gel we hear about is an flat pad of sticky gel from 3/8 to 3/4 thick inserted right under the seat cover. Flat gels where designed to simulate body fat for wheel chair seating. You may see other column gels ie Soft bottoms, all of them have 1 inch square or larger columns. Intelligel has columns 3 times smaller then other gels. Smaller columns provide the right amount of support and a controlled collapse and rebound rate. Intelligel is very effective at dampening vibration. Then – Foams, urethane, open cell , closed cell or memory foams are single hardness foam. All memory foams , except Sunmate, as fas as I know currently, are very temperature sensitive. Very hard when cold and very soft when hot. Laminated Sunmate is a mix of seating quality foams. Starting firmer near the gel and getting progressively softer as the foam nears the rider. This allows your weight to be spread over a greater area than other foams.