Do a search on "seat saddle" and you will find this is a much discussed subject. Also there is no universal correct seat as everybody has a different shaped butt. I am happy with a $15 Cdn seat that is firm, wide enough at the back for my sit-bones, but narrow at the front so it doesnt rub the inside of my thighs. When you go to a bike shop for seats, first check out their return/exchange policy, because there is no substitute for time riding to find out if it fits you.