Sounds like you ride a motorcycle. And that your leather jacket(s) have been soaked and retained water. In my experience it's best to waterproof leather with Pecards/Renapur prior to getting the jacket wet. While it doesn't make the jacket 100% waterproof, it will keep things dryer. Each time leather gets wet and dries, it loses some of its protective qualities. So keep that in mind; a jacket that has gotten wet/dried several times: you might think you're protected but your leather jacket might end up falling apart like paper mache in a crash. YMMV.
I have a naked Elk jacket I use for casual purposes, not riding. It really absorbs water so I try to avoid getting it wet. Suede in rain: forget it. Cow treated per above sheds water pretty well. My goat seems to shed water the best. I'll be riding with a kangaroo café racer soon and I anticipate it shedding water the best of any of my leathers. Hate to say it but well made textile jackets are probably the best for foul weather.
Ykurtz, kangaroo leather for a riding jacket sounds like the bomb! Who makes one?
Kangaroo is supposed to be the best abrasion resistant leather. My Held racing gloves have kangaroo on the palms.