I saw that too, & that's the part that confuses me, the "live moss" notation. Recently there was another thread about similar kind of moss- one that forms living
mounds- & while it's perfectly safe for reptiles, it actually draws IN moisture (to live on).Whereas sphagnum moss soaks up moisture (almost like a sponge)
and releases it to the air; when it dries out, you re-soak it & re-use it.
Speaking of which, why not just buy a natural sponge?