Dr. Linda S. McIntosh describes some ceremonial textiles produced and used by the non-Buddhist or shamanic Tai ethnic groups, using examples from the Tilleke & Gibbins Textile Collection to illustrate the article. Tilleke & Gibbins houses rare, museum-quality shamanic textiles with an indigo background, which are called phaa phii mon or phaa mau phii. Various design compositions, motifs, and functions of textiles are discussed in the article.