Based on the search results, it seems that Rumah Wangi Spa is a spa located in Bali, Indonesia. However, there is no detailed information about the ingredients or materials used in their spa products. The website and TripAdvisor page mention that they use natural ingredients, signature massage oils, spices, body mask, and exfoliating body scrub to help customers relax and revive. There are no negative reviews or comments about their products in the search results.