I currently ride in silicone breeches and I think they have a “bit” pattern.
I have only noticed a bit pattern in my saddle when I dismount. Fo ME on Sir SpooksAlot, I’ve noticed that I get unseated less when he has a hard spook in the silicane breeches. I used to ride just in knee patch breeches since 1) I don’t fit into my full seats but am trying to change that and 2) felt I had to rely on my balance more without a full seat.
The other day, for example, I had a beautiful uphill canter depart but on stride 2, Sir SpooksAlot spooked HARD at the Ditch of Death next to the arena that he was fine going by at the walk and trot 20 whole minutes previously. At the canter he saw dead people there for a moment but didn’t see them for the rest of the ride where he was happy and relaxed going be the Ditch of Death. Honestly, if not for the silicone, I would have been off. He splays his front legs suddenly widely so the saddle drops out from under you and wheels to a side in prep for a bolt so the center of balance is no longer the center of balance. I really recommend silicone breeches if you have a hypervigilant horse.