Merino Wool

Naturally breathable, odor-resistant and hypoallergenic wool fiber for temperature-regulating diaper covers.

What Is Merino Wool

Merino wool comes from the Merino sheep breed, originating in Spain and now raised mainly in the highlands of Australia and New Zealand. These sheep produce fibers just 17 microns in diameter, compared to 30-40 microns for regular wool, which is what makes merino feel silky rather than itchy against the skin.

Each fiber has a natural crimp that creates tiny air pockets, giving merino wool its ability to regulate temperature and manage moisture. It can absorb up to 35% of its weight in water vapor without feeling damp, while its outer layer naturally repels liquid water.

Why Merino Wool Is Ideal For Baby Diapers

A natural fiber that manages heat, moisture and odor better than synthetic alternatives.

Natural Temperature Regulation: merino wool creates a microclimate around the skin, absorbing excess moisture and releasing it in warm conditions, while crimped fibers trap warm air in cold conditions. This keeps babies comfortable year-round.

Superior Moisture Management: merino wool actively wicks moisture away from the skin, absorbing up to 30-35% of its weight before feeling damp. Wetness is pulled away and gradually evaporates, keeping the diaper area drier.

Natural Odor Resistance: lanolin-derived antimicrobial properties absorb and neutralize odor molecules, only releasing them during washing. A merino cover can be worn multiple times between washes, needing a wash only every 2-3 weeks.

Hypoallergenic and Gentle: at 17 microns, merino fibers bend easily against the skin, eliminating the scratchy sensation of regular wool. Studies show wearing merino wool can reduce infant eczema symptoms compared to other fabrics.

Breathability That Reduces Diaper Rash: continuous airflow through the fabric keeps the diaper area cooler and drier. Combined with moisture-wicking, this significantly reduces the conditions that cause diaper rash.

Durability: merino fibers can be bent back on themselves over 20,000 times without breaking – six times more durable than cotton. Covers keep their shape and performance through hundreds of wash and wear cycles.

Eco-Friendly and Sustainable: a 100% natural, renewable and biodegradable fiber. Sheep produce a new fleece every year, and at the end of its life merino wool decomposes naturally, unlike synthetics that persist in landfills.

Fabric Type

Is merino wool too hot for summer?

No. Merino wool actively regulates temperature—it cools in hot weather by releasing moisture vapor, and warms in cold weather by trapping insulating air. It is significantly more breathable than synthetic PUL covers and suitable for year-round use in any climate.

Will merino wool irritate my baby’s skin?

High-quality merino wool with fiber diameter of 17–18 microns will not itch or irritate. Merino fibers are far finer than regular wool and bend softly against the skin. Clinical studies have shown that merino wool can actually reduce eczema symptoms in infants.

How often do I need to wash a merino wool diaper cover?

Typically every 2–3 weeks unless soiled. Between uses, simply air the cover out. The natural antimicrobial properties of wool neutralize odors and keep the cover fresh without frequent washing.

Are merino wool diaper covers truly waterproof?

When properly lanolized, merino wool covers are highly water-resistant and effectively prevent leaks. They are not 100% waterproof like PUL, but their breathability and moisture management make them superior for overnight use and for babies prone to rash.

Is merino wool sustainable?

Yes. Merino wool is a 100% natural, renewable, and biodegradable fiber. Sheep produce a new fleece annually, and the wool decomposes naturally at end of life. Choosing wool over synthetic materials reduces dependence on petroleum-based products and landfill waste.

Why add spandex to merino wool?

The 4% spandex in our merino fabric blend provides essential stretch and recovery. Pure wool can lose its shape over time, especially with the frequent stretching that diaper covers undergo. Spandex ensures a snug fit around your baby’s legs and waist, preventing gaps and leaks while maintaining comfort.

Fabric Type

Merino fabric weights for lightweight covers and heavier-duty overnight performance.

96% Merino Fine Wool 4% Spandex

460g/M²

96% Merino Fine Wool 4% Spandex

400g/M²

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