ASS SAVERS Big Fender

I've had 2 'ass saver' type fenders before. One from Lightweight and one from Musguard. This Big Ass saver is definitely the best. It takes some attention to the instructions to get it installed, then it makes sense and is very secure. Mine is mounted to a 3D printed saddle and before I bought it, I did not appreciate the coverage it provides under the saddle, so that's nice. The size is only a bit larger (longer and wider) than the others but it block road spray much better. I do hit it with my foot when mounting or dismounting, but it stays in place. The other ones get significantly dislodged. The rainbow color is absolutely awesome!
I bought a second one for another bike.

Bought it despite the bad reviews below.
Very easy to install thanks to the clear instructions.
I installed it in a Bontrager Verse saddle with standard round rails.
It holds in place well and covers the gap in the saddle from the mud and water.
I rode 70 kilometers of very muddy terrain through fields and woods after rain when the whole bike was in the mud and my ass stayed dry and clean, I am very happy with the purchase. I've hit the fender with my foot several times when getting on the bike and it stays in place or shifts sideways a bit.
In a pinch, you can reinforce it with duct tape so it won't go anywhere.
Also, I forgot to add that I rode with it on a rocky trail with a strong shaking, also there were no problems.

It is wide and works perfect.