A: Melange is 50/50 blending of bamboo and cotton threads. The unique waterless coloring method makes the colors deep and true, and they’re bleachable and BPO safe. The two-tone Silver and Sand colors look the way they do because its created by twisting White cotton threads around Black or Beige bamboo threads, then woven together it appears as a texture. They are a bit cozier and comfy than the 100% bamboo sheets.