Organic Merino Wool Duvet Insert—
Naturally breathable wool that regulates temperature and prevents overheating.
GOTS-Certified Organic Wool + Cotton
Customizable Warmth — 150/350/500 gsm Options
Breathable, Thermo-Regulating Sleep All Year
Limited Stock Available
30 Days Returns
Free shipping on orders over $100
Details
Wrap yourself in naturally temperature-regulating comfort with this 100% GOTS-certified Merino wool duvet insert system. Designed to adapt to every season, this set includes a lighter 150 gsm layer for warmer months, a 350 gsm insert for transitional cool nights, and snaps together to create a cozy 500 gsm duvet for winter. With a soft organic cotton shell and premium wool fill that wicks moisture and breathes with your body, this duvet supports balanced sleep — cool when you need it, warm when you don’t.
- Three Adjustable Fill Weights
Use the 150 gsm insert in spring/summer, the 350 gsm on cool nights, or snap both for a 500 gsm winter duvet — all with one system. - GOTS-Certified Merino Wool Fill
Naturally breathable, moisture-wicking wool that regulates body temperature. - Organic Cotton Sateen Shell
Soft, smooth, and quiet — enhances comfort while keeping the fill in place. - Thermo-Regulating All-Season Comfort
Wool adapts to your sleep temperature so you stay comfortable without overheating. - Hypoallergenic & Skin-Gentle
Naturally resistant to allergens like dust mites, ideal for sensitive sleepers. This duvet insert meets the strict requirements of the Global Organic Textile Standard (GOTS) & STANDARD 100 by OEKO-TEX® certified.
Care
Dry clean recommended. Hand wash cold (30°C) only if necessary. Do not machine wash or tumble dry. Lay flat to dry.
Due to the natural properties of wool, heat and agitation may cause shrinkage and loss of loft.
Shipping and Returns
We take great pride in shipping fast.All orders received before 2pm EST- are shipped the same day and reach you in 3-5 business days.
If you're unhappy with your purchase, we'll find a solution for you. Most of our products can be returned within 30 days. All returns are subject to a $9.95 return fee deducted from your refund amount. Returns will be refunded to the original payment method or as a store credit. We do our best to make you comfortable, because let's face it, you're the best.
Have questions?
Get in touch with us at any time at contact@delarahome.com
WHY DELARA WORKS BETTER
The science behind better sleep
Active Temperature Regulation
Merino wool naturally adapts to your body temperature, keeping you warm when cool and cool when warm for balanced sleep all night.
Moisture-Wicking All Night
Merino wool absorbs moisture before feeling damp, helping keep you dry and comfortable at night. It's also naturally resistant to odors and bacteria.
Hypoallergenic by Nature
Merino wool naturally resists dust mites, mold, and bacteria. GOTS-certified and free from harsh chemicals, it's ideal for sensitive skin.
Naturally Sustainable
Merino wool is renewable, biodegradable, and lower impact than synthetic fills. Our GOTS certification ensures responsible sourcing from farm to product.
What Makes This an Organic Comforter?
Delara’s all-season Merino wool comforter is backed by GOTS, OEKO-TEX Standard 100, and Woolmark certifications for trusted quality, safety, and performance.
The Merino Wool Comforter for Hot Sleepers
Merino wool naturally regulates temperature and moisture, helping hot sleepers stay comfortable all night. Our 300 GSM weight delivers balanced sleep without overheating.
Organic Cotton Shell — 400TC Sateen Weave
We chose a 400-thread-count organic cotton sateen shell for its smooth, noiseless feel and ability to prevent fiber escape while maintaining the natural breathability of Merino wool.
All-Season Comfort: What "300 GSM" Actually Means for Sleep
Our 300 GSM all-season comforter provides balanced year-round warmth for most climates, while the 400 GSM winter weight offers extra insulation for colder environments and cold sleepers.
THE WEIGHT GUIDE
Find your perfect weight
Every fill weight uses the same GOTS-certified Merino wool and organic cotton shell, only the warmth level changes.
200 GSM
Spring / Summer
Lightweight Breathable
Maximum airflow for warm nights. Ideal for hot sleepers, warm climates, or summer months. Use standalone or as the light layer in a 3-in-1 system.
Best for: Warm sleepers · Southern climates · Summer
Shop 200 GSM300 GSM
All Season
Perfect All-Year Weight
Provides balanced four-season comfort for most climates warm enough for cooler months, breathable for milder nights. A true everyday duvet solution.
Best for: Most sleepers · Most U.S. climates · Year-round
Shop 300 GSM400 GSM
Winter
Deep Winter Warmth
Maximum insulation for very cold nights and cold-climate winters. Still naturally breathable due to its unique fiber structure, preventing overheating.
Best for: Cold sleepers · Northern climates · Winter
Shop 400 GSMNot all comforters are created equal
See how Delara Merino stacks up against the alternatives on every dimension that matters for sleep quality.
| Feature | Delara Merino Wool | Down / Feather | Synthetic Fill | Standard Wool |
|---|---|---|---|---|
| Temperature Regulation | ✓ Active | ~ Passive only | ✕ None | ~ Basic |
| Moisture Wicking | ✓ Excellent | ✕ Traps sweat | ✕ None | ~ Moderate |
| Hypoallergenic | ✓ Yes | ✕ Common allergen | ~ Varies | ~ Usually |
| GOTS Certified Organic | ✓ Both fill & shell | ✕ Rarely | ✕ No | ~ Sometimes |
| Softness (fiber microns) | ✓ 18–24 microns | ✓ Soft | ~ Variable | ✕ Can be coarse |
| Biodegradable | ✓ Yes | ✓ Yes | ✕ No | ✓ Yes |
| Machine Washable | ✓ Gentle cycle | ~ Some | ✓ Usually | ✕ Dry clean only |
| Longevity | ✓ 10–20+ years | ~ 5–10 years | ✕ 2–5 years | ~ 7–12 years |
CERTIFIED & VERIFIED
We don’t just say organic. We prove it.
We have three—not just one—of the most rigorous independent certifications in the textile industry.
Every question, honestly answered.
What is the All Season Merino Wool Duvet filled with?
This duvet is filled with 100% sterilized and hypoallergenic Merino wool, providing comfort, safety, and natural temperature regulation year-round.
How does this wool duvet insert regulate temperature?
The Merino wool fibers adjust to your body’s natural heat, keeping you warm in winter and cool in warmer months, ensuring a comfortable sleep environment.
What fabric is used for the cover?
The duvet insert is encased in 400 TC sateen weave organic cotton, which is smooth, breathable, and noiseless for a luxurious feel.
Is this duvet suitable for sensitive skin?
Yes, both the sterilized wool fill and OEKO-TEX® & GOTS-certified cotton fabric make it safe and gentle for all skin types.
What sizes are available?
This duvet is available in twin, queen, and king sizes to suit a variety of beds and bedroom styles.
What is merino wool and why is it used in this duvet?
Merino wool is a premium natural fiber known for its breathability, moisture-wicking, and temperature-regulating properties. It helps keep you warm when it’s cool and releases excess heat when it’s warm, creating a more balanced sleep environment.
Is this duvet suitable for all seasons?
Yes. This duvet features a 3-in-1 modular design, allowing you to use:
The lighter insert for warmer months, the medium insert for mild or transitional seasons, or combine both for colder weather.
This flexibility makes it suitable for year-round use and changing room temperatures.
What room temperatures is this duvet best for?
The individual inserts are ideal for bedrooms between 60–75°F, depending on which layer you use. When combined, the duvet is well-suited for cooler rooms below 65°F. Wool naturally adapts to your environment rather than trapping heat.
Will this duvet feel heavy or bulky?
No. Merino wool provides warmth without excessive weight. The fill is evenly distributed to feel comfortably insulating, not dense or suffocating like some traditional duvets.
Is wool good for hot sleepers?
Yes — many hot sleepers prefer wool because it absorbs and releases moisture vapor, helping prevent overheating. While it’s not “cooling,” it actively helps regulate temperature throughout the night.
Is this duvet hypoallergenic?
Wool is naturally resistant to dust mites and helps manage moisture, which can create a cleaner sleep environment. Combined with organic processing, this makes it a good option for many allergy-sensitive sleepers.
What does GOTS-certified mean for this duvet?
GOTS certification ensures the wool is organically sourced and responsibly processed, meeting strict environmental and social standards without harmful chemicals.
Does the duvet make noise or shift inside the cover?
No. The wool fill is quiet and flexible, and the inserts are designed to stay evenly distributed. When paired with a duvet cover that has internal ties, the duvet remains securely in place.
How do I care for this wool duvet?
We recommend spot cleaning when possible and using a duvet cover to protect it. For deeper cleaning, follow care instructions carefully — typically gentle washing or professional cleaning to preserve the wool fibers.
How is this different from a down or down-alternative duvet?
Unlike down or synthetic fills, wool naturally regulates temperature and moisture without trapping heat. It’s also biodegradable, breathable, and performs well across a wider range of room conditions.
COMPLETE YOUR SLEEP
Pairs perfectly with cozy essentials
Your best night's sleep is one decision away
Free shipping on orders over $100. 7-day home trial period. 30-day return guaranteed.
