We recommend cold water wash.

Tumble Dry at low temperatures.

Always wash towels separately from other home textiles and
      garments. (zippers, hooks, snaps and velcro can pull)

We recommend using liquid soaps.
      (powders tend to clump and may stain/bleach)

The following are examples of gentle soaps we recommend:
      LaBlanc “Linen Wash”, LaBlanc “Silk and Lingerie Wash”,
      Ivory Liquid, Dreft Liquid and Planet Liquid.

Use maximum water and half the recommended detergent.

DO NOT use detergents with “Brighteners” or “Bleach Alternatives”
      – these can remove color.

DO NOT use fabric softeners. They clog cotton fibers and prevent
      them from wicking moisture. They can also remove color from
      towels.

NEVER use bleach, even on white towels.

Certain cleaning and hygiene products contain ingredients which
      cause bleaching, some of these include: blemish creams, products
      containing alpha hydroxyl and fruit acid, hair coloring products,
      some bathroom cleaners and teeth whiteners.