A high-loft wool or down quilt is usually the warmest choice for winter. Both fillings trap warm air around your body, helping you stay cosy as temperatures drop.
Key Takeaways
- Wool and down are among the warmest winter quilt fillings, while silk and synthetic options suit sleepers who prefer lighter or more breathable warmth.
- TOG measures how well a quilt traps heat, while GSM measures filling weight or density. Consider your bedroom temperature, climate, sleeping style, preferred weight, allergies, and care needs.
- The Ecosa Australian Wool Quilt is our warmest winter option, while the Luxe Silk, TempRite, and Cooling Quilts suit different sleepers and seasons.
The best option still depends on your climate and how you sleep. A cold sleeper may love a thick wool quilt, while a hot sleeper might prefer something lighter and more breathable.
What Are the Warmest Quilt Fillings?
Down and feather, wool, high-GSM synthetic fibres, and silk are some of the warmest quilt fillings for winter.
Each material holds heat differently. Some feel light and fluffy, while others rest more heavily across the body. Your ideal choice depends on your climate, budget, and whether you sleep hot or cold.
| Quilt filling | Warmth and feel | Best suited to | Ecosa option |
| Wool | Warm, breathable, moisture-wicking, and softly lofty | Cold sleepers and chilly bedrooms | Ecosa Australian Wool Quilt, 500 GSM |
| Down and feather | Light, fluffy, and highly insulating | Cold sleepers who dislike heavy bedding | Not available in the Ecosa range |
| Synthetic | Affordable, easy-care, and available in different warmth levels | Budget-conscious households and hot sleepers | Ecosa TempRite Quilt or Cooling Quilt |
| Silk | Light, smooth, breathable, and adjustable | Hot sleepers, mild winters, or layered warmth | Ecosa Luxe Silk Quilt, up to 850 GSM combined |
1. Wool Quilts
Wool quilts trap warm air while drawing away moisture, giving you steady warmth without feeling stuffy.
For a winter-ready option, the Ecosa Australian Wool Quilt uses 100% Woolmark-certified Australian wool and comes in a cosy 500 GSM weight for colder climates and sleepers who feel the chill. Its down-like loft feels light and fluffy, so you can stay snug without wrestling a bulky quilt all night.
2. Down and Feather Quilts
Down and feather quilts trap pockets of warm air, giving you plenty of warmth without a heavy feel. Down adds soft, fluffy loft, while feathers provide structure and a little more weight.
A higher down-to-feather ratio usually creates a lighter and warmer winter quilt. So, check the blend carefully, as feather-heavy options may feel flatter and heavier.
3. Synthetic Quilts
Synthetic quilts use polyester or microfibre fill to trap warm air at a lower price point. Higher-GSM options generally feel warmer, though ratings should only be compared between similar materials.
The Ecosa TempRite Quilt combines bamboo and recycled polyester in a 300 GSM all-season fill for cosy, breathable winter comfort. Hot sleepers may prefer the lighter Ecosa Cooling Quilt, which uses a sweat-wicking bamboo-polyester core and cool-to-touch fabric to reduce overheating.
4. Silk Quilts
Silk quilts offer light, breathable warmth and sit smoothly around the body without feeling bulky. Their fine fibres help release excess heat, making them a good pick for hot sleepers or milder winters.
The Ecosa Luxe Silk Quilt uses 100% pure long-strand silk floss with a breathable cotton outer, and its 300 GSM and 550 GSM layers can be clipped together for an 850 GSM winter setup. You get extra warmth when the temperature drops, then can separate the layers again as the weather warms up.
Quilt GSM vs TOG Ratings
TOG stands for Thermal Overall Grade and measures how effectively a quilt traps heat. GSM stands for grams per square metre and measures the weight or density of the filling.
Both can help you compare quilts, but they don’t tell you the same thing.
| Point | TOG | GSM |
| Meaning | Thermal Overall Grade | Grams per square metre |
| Measures | Heat retention | Filling weight or density |
| Higher number | More warmth | More or heavier filling |
| Best for | Comparing thermal insulation | Comparing similar quilt materials |
| Keep in mind | Does not show quilt weight | Does not always reflect warmth |
TOG
TOG tells you how effectively a quilt traps body heat. A higher rating provides more insulation, while a lower rating feels cooler and lighter.
You may see TOG ratings on:
- Quilts and duvets
- Baby sleep bags and sleep sacks
- Swaddles and thermal sleepwear
Winter quilts often sit around 12 TOG or higher, though the right rating still depends on your bedroom temperature and how warmly you sleep.
GSM
GSM tells you how many grams of filling sit within each square metre of a quilt. A higher GSM usually means more filling and a heavier feel.
You may see GSM listed on:
- Quilts and doonas
- Mattress protectors
- Sheets and quilt covers
- Towels and robes
A winter quilt may have a GSM of 500 or more, but material still matters. Down can provide strong insulation at a lower GSM, while dense synthetic or wool fills may need more weight to deliver a similar level of warmth.
How to Choose the Right Quilt Warmth
Choose your quilt warmth based on your bedroom temperature, sleeping habits, preferred weight, and the type of filling that feels best to you.
1. Check Your Bedroom Temperature
A colder bedroom usually calls for a thicker, more insulating quilt. If your room regularly drops below about 15°C, look for a winter-weight option with a higher GSM, TOG rating, or loft.
Warmer homes may only need a medium-weight quilt, even during winter. Good insulation, heating, and thick curtains can all change how cold your bed feels.
2. Think About How You Sleep
Your natural body temperature should guide how warm your quilt needs to be.
- Cold sleepers: Choose wool, down, or a thicker synthetic fill to hold more body heat through the night.
- Hot sleepers: Look for silk, lighter wool, or a temperature-regulating synthetic fill that releases extra warmth. You can also use a cooling quilt during winter if your bedroom stays mild or you tend to overheat beneath heavier bedding.
- Couples: Consider a medium-weight quilt or separate quilts if one person sleeps hot and the other sleeps cold.
Sharing a bed can be tricky. One person may be wrapped like a burrito while the other has already kicked the quilt onto the floor.
3. Choose a Filling That Suits You
The filling affects warmth, weight, airflow, and how the quilt sits across your body.
| Quilt filling | How it feels | Best suited to |
| Wool | Warm, breathable, and more substantial | Sleepers who want steady warmth and moisture control |
| Down and feather | Light, fluffy, and lofty | Sleepers who feel cold but dislike heavy bedding |
| Synthetic | Soft, practical, and often easy to wash | Sleepers who want an affordable, easy-care option or are sensitive to common allergens |
| Silk | Smooth, light, and breathable | Sleepers who run hot or dislike bulky quilts |
Think about the feeling you enjoy, not just the warmth rating. A quilt can perform well on paper and still feel wrong if you dislike its weight or texture.
4. Consider Loft and Weight
A lofty quilt traps warm air without always adding much weight. Down, for example, can feel fluffy and cosy without pressing heavily on your body.
Wool and some synthetic quilts feel more substantial. That extra weight may feel comforting, but sleepers who prefer lighter bedding might find it restrictive.
5. Factor In Allergies and Care
Your quilt should suit your washing routine and any allergy concerns. Synthetic options are often machine washable, while wool, silk, and down may need gentler care.
Always check the care label before cleaning. Silk quilt owners can also read our guide on how to clean a silk quilt for tips on airing, spot treating, and protecting delicate fibres.
6. Match the Quilt to Your Climate
The best winter quilt depends on where you live and how well your home holds heat. A heavier quilt may suit frosty inland nights, while a lighter, breathable option can work better in milder coastal areas.
Tips to Feel Warmer in Winter
To feel warmer in winter, trap more heat around your body and bedroom.
- Close curtains at night to keep warm air inside
- Seal draughts around windows, doors, and floor gaps
- Layer breathable sheets, blankets, and a winter-weight quilt
- Wear warm socks and lightweight thermals to bed
- Use a hot water bottle to warm cold sheets
- Open curtains during sunny hours to bring in natural warmth
Best Ecosa Quilts for Winter
The best Ecosa quilt for winter depends on how cold your bedroom gets and how much warmth you enjoy while sleeping.
| Ecosa quilt | Best suited to | Warmth and features |
| Australian Wool Quilt | Sleepers who feel cold or have chilly bedrooms | Warm, breathable 500 GSM Australian wool with moisture control |
| Luxe Silk Quilt | Sleepers who want adjustable warmth across seasons | Light, breathable layers that combine for an 850 GSM setup |
| TempRite Quilt | Sleepers who want an easy-care, year-round option | Cosy 300 GSM fill that is machine washable and quick drying |
| Cooling Quilt | Sleepers who run hot during milder winter nights | Lightweight, sweat-wicking fill with cool-to-touch fabric |
1. Australian Wool Quilt
Built for cold sleepers and chilly bedrooms, the Australian Wool Quilt is our warmest winter pick. Its 500 GSM fill uses 100% Woolmark-certified Australian wool to hold warmth while drawing away moisture. A soft, down-like loft keeps it cosy without the heavy feel of a traditional wool quilt.
2. Luxe Silk Quilt
For flexible warmth across the seasons, the Luxe Silk Quilt gives you two layers to work with. Clip the 300 GSM and 550 GSM quilts together for an 850 GSM winter setup, then separate them when the weather warms. Pure long-strand silk feels light, breathable, and snug without pressing heavily on your body.
3. TempRite Quilt
Want one quilt that works throughout the year? The TempRite Quilt uses a plush 300 GSM blend of bamboo and recycled polyester for breathable winter comfort. It is also hypoallergenic, machine washable, and quick drying, which makes everyday care much easier.
4. Cooling Quilt
Hot sleepers may feel more comfortable under the Cooling Quilt during milder winter nights. Its lightweight bamboo and polyester core draws away sweat, while the cool-to-touch cover helps the bed feel around 2°C to 5°C cooler. Use it on its own or add a breathable blanket when the temperature drops.
Shop Ecosa Quilts for a Warm Winter
For our warmest winter option, choose the Ecosa Australian Wool Quilt. Its 500 GSM Woolmark-certified Australian wool fill provides cosy warmth for cold sleepers and chilly bedrooms.
Pair it with our bamboo quilt covers for an extra-soft, breathable layer that gives your bed a plush winter finish. You can also explore our full bedding range for sheets and pillowcases to complete your cosy winter setup.