Wash your Supima cotton with similarly sized items to prevent tangling and uneven washing. For instance, a Supima sheet will engulf a T-shirt in the washing machine and prevent the shirt from being thoroughly laundered.
Launder your Supima cotton with similar colors on the gentle cycle, using a mild detergent. Although the durability of Supima can withstand a regular wash cycle, rough laundering techniques eventually break down even the most durable of fibers.
Tumble your Supima cotton in the dryer until it is slightly damp, and then let it air dry. Although Supima cotton can withstand high drying heat, this will cause the fibers to deteriorate faster.