Having spent several years and lots of money on various expensive saddles, cycle shorts etc I eventually took the advice from several previous posts. Try a Charge Spoon, probably the best £20 I've spent on cycle stuff. I've done a couple of hundred miles in last 2 weeks and swear it,s the answer. I agree that the cover material does not allow you to slide about very easily and it does tend to hold on to the chamois but you soon get round this by raising yourself slightly prior to move, who knows maybe it will get a bit more "slidy" with use :-)