Honest. It is the only mix I found that does not contain peat (which is highly unsuitable for orchids, especially phalaenopsis). It seems to be pure bark (medium pieces, in mini orchids it was borderline in size. If your orchid and its pot are under 9cm, it may be a little big) with a few pieces of terracotta (?)... I don't know what role terracotta plays and I would prefer it to be perlite, but it doesn't seem to harm so all good.