Sleep

What is the best fabric for sleepwear?

The best sleepwear fabrics are soft, breathable, and free from irritating chemicals. Organic cotton is the most popular choice — it is gentle on skin, easy to wash, and available in lightweight jersey or woven forms. For colder months, brushed organic cotton flannel or merino wool blends provide warmth without overheating. Silk charmeuse is a luxurious option that drapes beautifully and naturally regulates temperature.

Avoid sleepwear made from 100% polyester or treated with wrinkle-free finishes, which can off-gas formaldehyde and other chemicals close to your skin for hours every night. Since you spend roughly a third of your life sleeping, the fabric against your body during those hours deserves as much attention as the food you eat.

ONDU features sleepwear from brands committed to certified organic and natural fibers, so you can rest easy knowing what is touching your skin all night.

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Know Your Fabric

Not all “sustainable” fabrics are equal. Here's what actually matters.

Tencel™ Lyocell

Source

Eucalyptus, beechwood, pine trees

Feel

Silky smooth, cool to touch

Why

50% more absorbent than cotton. Biodegradable. Closed-loop production uses 95% less water.

Merino Wool

Source

Merino sheep (look for ethical/mulesing-free farms)

Feel

Soft, lightweight, not itchy

Why

Natural temperature regulation. Antibacterial. Odor resistant. Moisture wicking without plastic.

Organic Cotton

Source

Cotton plants grown without pesticides or synthetic fertilizers

Feel

Soft, breathable, familiar

Why

No toxic residue on skin. GOTS certification ensures clean processing. Best for low-impact activities.

Hemp

Source

Hemp plant (needs minimal water and no pesticides)

Feel

Sturdy, softens with wear

Why

Naturally antibacterial. UV resistant. Gets softer every wash. Most eco-friendly crop on earth.

Alpaca Wool

Source

Alpaca farms (primarily Peru)

Feel

Softer than cashmere, hypoallergenic

Why

No lanolin = hypoallergenic. Thermal regulation. Biodegradable. Low environmental footprint.

Linen

Source

Flax plant

Feel

Cool, crisp, relaxed

Why

Strongest natural fiber. Fully biodegradable. Needs almost no water or pesticides to grow.