The healthiest material for a pillowcase for most people is 100% mulberry silk, particularly silk with a momme weight of 19 to 25, followed closely by organic cotton and organic linen. Mulberry silk is considered the healthiest because it is a natural protein fiber that is inherently hypoallergenic, naturally resistant to dust mites, mold, and mildew, and has a very low friction coefficient that reduces pulling and creasing on sensitive facial skin and reduces hair breakage, tangling, and frizz. It also does not absorb moisture from your skin and hair as aggressively as cotton, so it helps retain natural oils and skincare products. Organic cotton is another excellent healthy choice, especially organic cotton sateen or percale, because it is breathable, soft, absorbent, easy to wash in hot water to kill bacteria, and grown without harsh pesticides. Linen is highly breathable, moisture-wicking, and naturally antibacterial, though its texture is coarser. The least healthy common materials are low-quality polyester and polyester satin, which trap heat, do not breathe, hold onto sweat and oils, and can exacerbate acne or irritation. For overall skin, hair, and allergy health, silk is the top choice.
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