Why Wool? A Guide to Wool Diaper Covers and How to Care for Them

If you’re venturing into the world of cloth diapering, you’ve probably heard whispers about wool diaper covers—maybe even passionate raves. But what’s the big deal with wool, and is it really practical for everyday diapering? Spoiler alert: Yes, it is! Wool covers are not only a beautiful, breathable alternative to plastic-based covers, but they’re also naturally antimicrobial and surprisingly easy to care for once you know the basics.

Let’s dig into how wool diaper covers work and how to keep them in tip-top shape.

How Wool Diaper Covers Work

Wool covers are used as the waterproof layer over fitted, flat, or prefold cloth diapers. Though they don't feel waterproof in the traditional sense (they're not plastic or PUL), lanolized wool is remarkably effective at keeping moisture contained.

Here’s why they work:

  • Lanolin is the magic ingredient. Wool naturally contains lanolin, a waxy substance produced by sheep. When properly lanolized, wool creates a water-repelling barrier that keeps wetness inside the diaper, but still allows air to circulate.

  • Breathability helps prevent rashes. Unlike synthetic covers, wool is incredibly breathable. That means it allows moisture and heat to escape, which can reduce the risk of diaper rash and keep your baby comfortable.

  • Absorbent but leak-resistant. Wool can absorb up to 30% of its weight in liquid without feeling wet, and if it does get damp, it will dry quickly with proper air circulation.

Why Parents Love Wool Covers

  • Naturally antibacterial: Wool can neutralize urine odors, which means it doesn’t need to be washed after every use. Airing it out between uses is usually enough.

  • Temperature regulating: Wool keeps your baby cool in summer and warm in winter.

  • Eco-friendly: It’s a natural, biodegradable material—and when sourced responsibly, it’s a sustainable choice.

  • Long-lasting: With the right care, wool covers can last through multiple children.

How to Care for Wool Diaper Covers

Wool care might sound intimidating at first, but once you’ve done it a couple of times, it becomes second nature.

1. Wash Infrequently

You don’t need to wash wool after every use—only when it’s soiled or starts to smell. For covers used over a diaper that hasn’t leaked poop, you can typically go 2–3 weeks between washes.

2. Hand Wash with a Wool Wash

Use a gentle wool wash (preferably one that contains lanolin). Fill a basin with lukewarm water, add the wool wash, and gently swish the cover around. Let it soak for about 15 minutes. Avoid agitating the wool too much—this can cause felting.

3. Rinse Gently

Drain the water and gently press out excess moisture. Refill the basin with clean water to rinse. Do not wring or twist the wool.

4. Re-Lanolize Occasionally

Over time, the natural lanolin in wool wears off. You’ll need to relanolize your covers every 3–6 weeks or after each wash, depending on use.

Here’s how:

  • Dissolve a pea-sized amount of solid lanolin (or the amount recommended by your lanolin product) in hot water with a few drops of baby shampoo or emulsifying wool wash.

  • Add the mixture to lukewarm water and soak your cover for about 30 minutes.

  • Gently press out the water and lay the cover flat to dry—preferably on a towel, away from direct heat or sunlight.

5. Dry Flat

Always dry wool flat to retain its shape. Avoid hanging it or putting it in the dryer.

Bonus Tips for Wool Success

  • Have at least two wool covers so you can rotate and give each one time to air out between uses.

  • Use fitted diapers or prefolds with strong elastic to minimize leaks.

  • Don’t be afraid to trim long fibers or pilling—this is normal and won’t harm the wool.

The Bottom Line

Wool diaper covers are a wonderful, natural option for cloth diapering families. With just a little care and a dash of lanolin, wool becomes a breathable, odor-resistant, leak-fighting superhero of the diaper world. Whether you're using them overnight, during naps, or full-time, wool can simplify your cloth diapering journey while keeping your baby cozy and dry.