Top 3 Duvet Fills Compared: Polyester, Down, and Strong Wool — What is the Best Type of Fill for my Duvet? (2025)
Choosing the right duvet fill is crucial for year-round comfort and restful sleep. Wool, down, and polyester each have distinct advantages. Here’s how they compare:
Is Wool a Good Material for Inside Duvets?
Yes, 100% pure strong wool — particularly from New Zealand — is an excellent duvet fill choice. Wool’s natural properties regulate body temperature, ensuring warmth in winter and coolness in summer. Its moisture-wicking ability keeps sleepers dry and comfortable. Additionally, wool is a renewable, biodegradable resource, making it one of the most eco-friendly duvet fill options available.
| PROS ✅ | CONS ❌ |
|---|---|
| Warm yet breathable | Slightly heavier than other materials |
| Naturally hypoallergenic and odour-resistant | Requires special washing instructions |
| Sustainable and biodegradable | |
| Excellent durability |
How Does Down Compare for Duvet Fill?
Down duvets are prized for their luxurious softness and lightweight insulation. They provide exceptional warmth but can retain moisture, which may lead to odour issues without proper care. Additionally, there are ethical concerns about downsourcing, particularly related to animal welfare practices in some regions.
| PROS ✅ | CONS ❌ |
|---|---|
| Soft and Fluffy | Expensive |
| Excellent insulation | Can trigger allergies |
| Lightweight for easier handling | Requires professional cleaning to maintain quality |
Do Polyester Blended Fills Work for Duvets?
Polyester and synthetic blends are popular due to their affordability and easy maintenance. However, they often trap heat and moisture, making them less breathable than natural fibres. Additionally, polyester is derived from non-renewable resources, contributes to microplastic pollution, and is not biodegradable, raising concerns about its environmental impact.
| PROS ✅ | CONS ❌ |
|---|---|
| Budget-friendly | Less breathable than wool or down |
| Lightweight and easy to clean | Prone to harbouring odours |
| Durable for long-term use | Contributes to microplastic pollution |
Which Duvet Fill is Best for You?
For superior temperature control, breathability, and sustainability, 100% pure strong wool is the ideal choice.
For lightweight warmth and a luxurious feel, down excels but requires maintenance.
For a budget-friendly, low-maintenance option, polyester is practical but less breathable.
Looking for the perfect duvet material? Explore Wisewool’s strong wool in your duvet for unmatched comfort and sustainability. Contact the Wisewool team today.