We bought the first one pictured because we had to replace the vermiculite in our hide, and it was all that PetSmart had...it's okay, we had to shred it into a bunch of pieces and it's been working well, we already had a female lay eggs in it.. We are going to replace it with Sphagnum moss as soon as we can, though. I don't know about the second one (not sure what fir moss is), but the Fluker's moss looks good too.