I had my 16 seat recovered and gel inserts, never found it too bad but i had damaged the original cover so thought while its being done i will have inserts too...
Worst thing i could have done, the heat generated by the gel in the height of summer was unbearable... For me anyway, sensitive back side
I swapped it out for a standard one and all is well in the world again
Sheepskin for my 10hr+ touring days though
Not what the OP was asking, sorry