Three jobs at once. It shields your mattress from sweat, body oils, and allergens — the invisible nightly wear that stains and degrades it. It regulates temperature, wicking heat and moisture away from your body so the sleep surface stays cool and dry. And it adds a subtle half-inch of quilted wool cushioning. A protector is the single highest-value layer you can add to any bed.

Merino wool naturally manages moisture and heat. It helps move excess moisture away from the body while allowing air to circulate, helping maintain a more comfortable sleep temperature.

This is the #1 reason people buy one — and yes. Foam and latex store body heat and radiate it back at you. A quilted wool layer intercepts that heat with a breathable, moisture-wicking buffer before it builds up. Most hot sleepers notice the difference the first night, at a small fraction of the cost of replacing the mattress with a "cooling" model.

The industry-standard way to process washable wool is a chlorine bath that strips the fiber's natural scales — and chlorine-based treatment is prohibited under GOTS. That's why leading washable wool protectors carry OEKO-TEX at most. Delara's protector is GOTS certified fiber to finish: chlorine-free wool fill, organic cotton cover, and every processing step independently audited. If avoiding chemicals is why you're buying wool, the certification is the guarantee.

No — deliberately. Waterproof protectors rely on vinyl or polyurethane films that block airflow, trap heat, and crinkle under your sheets. If you need spill protection for a child's bed, choose a waterproof layer. If your goals are cooling, hygiene, allergen defense, and mattress protection from nightly wear, a breathable wool protector does those jobs better — because it breathes. Wool also naturally resists moisture absorption at the surface, handling everyday humidity with ease.

Machine wash cold on a gentle or wool cycle with a wool-safe detergent, low spin, then line dry or lay flat — never tumble dry. Because wool is naturally odor and bacteria resistant, the protector only needs washing a few times a year; airing it in sunlight between washes refreshes it naturally.

Barely — by design. At roughly half an inch of evenly quilted wool, it adds a whisper of cushioned softness while fully preserving your mattress's support and feel. The deep elasticated skirt fits mattresses up to 19″ deep, with or without a topper, and stays put without shifting. If you want to meaningfully soften a firm mattress, layer our plush mattress pad on top of it.

Sleep on it for 30 nights. Feel what it does for a hot mattress, wash it, live with it. If it's not the best protector you've owned, return it for a full refund. Orders before 2pm EST ship the same day from our US warehouse, and shipping is free on orders over $100.