https://www.thesun.co.uk/tvandshowbi...aac-chewbacca/
Looks like Finn has a new look, largely ditching the Poe's jacket look from the last two films. Poe sort of has a slight "indiana Jones" look.
I'm guessing those horses will have CG added in addition to that fur, hence the orange stuff.
The costumes of the other characters seem a bit reminiscent of ROTJ's forest camo outfits.