Keeps sliding forward

… On my saddle. Don’t recal the problem being so bad on my old Cobb Plus as on my new Sitero Pro… Any guesses?

The Sitero is designed for the rider to sit more to the front near the nose of the saddle. So if you are just wanting to sit up further on the saddle that is natural. However, if you are sliding like you are going to fall off the seat, you may have the saddle angled down too far.