By Bed Threads Bedding 23.10.2026

How to Find the Best Fluffy Duvet Insert

Searching for the best fluffy duvet insert? Follow these tips to get the bed of your dreams.

Replacing an old duvet insert isn’t as simple as it seems.

With plenty of options to choose from, not all are created equal. But how do you tell whether a duvet insert is truly worth it?

To help guide your journey, we’ve broken it into a few simple categories. With these tips, you’ll be better equipped to find the best duvet insert – one that is fluffy now and will hold its shape for years to come!

What to look for in a fluffy duvet insert

High-quality construction

The key to choosing a duvet insert that stays soft and puffy long after its first use is choosing a high-quality option.

Most duvet inserts will feel soft and bouncy the first few times you use them, even through the second or third wash. But anyone who’s ever bought the budget option knows a low-quality duvet insert can deflate quickly, leaving you with flat, floppy bedding.

When it comes to quality, there are a few key factors to consider:

Construction: A well-constructed duvet should prevent its filling from shifting and bunching. The two most recommended duvet insert constructions are box-stitched and baffle-box, both of which segment the insert into small compartments that keep the filling evenly distributed. While baffle-box is a nice option, we prefer box-stitched inserts because they are lighter, less dense, and typically better value than baffle-box alternatives.
GSM: Grams per square meter (GSM) indicates a fabric’s weight and is another strong indicator of quality. For duvet inserts, GSM typically ranges from 100-500+. Our Does-it-All Duvet Insert sits on the high side of that spectrum, thanks to the high-quality fabric and filling it’s made from.
Weight: Duvet insert weight makes a substantial difference to how your bedding looks and feels. Generally, you should choose a medium-weight option to strike the right balance between substance and comfort. If a duvet insert is too light, it may shift during the night or feel cheap, while a too-heavy insert can feel stifling and cause you to overheat while sleeping.

Temperature-regulating abilities

In addition to weight, other factors impact how good at regulating temperature a duvet insert is (or is not). When considering options, keep these things in mind:

Cool-to-the-touch feel: A high-quality duvet insert's cool-to-the-touch feel comes from a combination of fabric and weave. This feature helps hot sleepers fall asleep more comfortably and prevents heat from getting trapped between bedding layers while you sleep.
Temperature regulating: Additionally, duvet inserts should be both fluffy and temperature-regulating. While it may sound contradictory that a duvet can be both puffy and breathable, the right fabrication can keep even the fluffiest duvet insert comfortable. Look for fibres that naturally absorb and wick away moisture, such as lyocell, which naturally adapts to your body’s temperature.

Mindful materials

Beyond temperature regulation, consider other factors when choosing the materials that make up a duvet insert. The very best quality inserts should meet these standards:

Hypoallergenic: Choosing a duvet insert made from hypoallergenic materials gives you the best chance of a good night’s sleep. While duvet inserts have traditionally been filled with feathers, modern alternatives have evolved to reduce irritation for those with sensitivities. If you are particularly prone to allergies, you’re probably best off choosing inserts made from plant-based fibres.
Plant-based and biodegradable: In addition to being allergy-friendly, duvet inserts made from plant-based fibres like lyocell are also better for our planet. The fabric in our Does-it-All Duvet insert, for example, is crafted from responsibly sourced wood pulp and made in a process that reuses water.
Doesn’t harbour mites: Finally, choose a duvet that doesn’t harbour dust mites. Some materials – including down, cotton and wool – are more conducive to dust mites, making them worse choices for duvet inserts.

Key takeaways

Now that you know what to look for in a duvet insert, you’re well-equipped to find a fluffy new option to replace your old one. In summary, the keys to a duvet that will stay soft now and into the future are: