Comparing Duvet Inserts: A 2024 Buyer’s Guide to Comforters

At Mulberry Park Silks, we think sleeping in the beauty and comfort of pure mulberry silk sheets is a luxury everyone should experience. We also recommend leveling up your bedspread game with one of our pure silk duvet covers.

But there's one more accessory you need to complete your dream bed: a feathery soft, lighter than air duvet insert that transforms your bed into an oasis of opulence, well-being, and rest. That's why we've curated this collection of the highest quality comforters on earth, both in down and eco-friendly down alternatives. All are crafted from the finest materials and finished with exquisite detail to ensure the durability, comfort, and performance you expect from Mulberry Park Silks bed linen.

About Duvet Insert Terms

Model Holds Duvet Insert

Before we begin, let's quickly define some terms. A duvet, duvet insert, and down/alternative fill comforter are three words that describe essentially the same item. Sized to fit inside a high-end duvet cover -- like those in our silk collection -- a luxury duvet can come in a variety of options for warmth, weight, and fill power. High-quality duvet inserts are made with a baffle box, or compartmentalized, construction or optimal thermal insulation. The compartments prevent the down or fill from moving so the duvet maintains warmth while eliminating cold spots.

Down vs. Alternative Fill Duvet Inserts

Luxury duvet inserts are most often filled with white goose down and made from high thread count cotton. The highest quality down originates from the belly and under wings of mature white geese raised and bred in the cold Siberian and Hungarian climates known for their resilient down. A special gathering process ensures larger, stronger down clusters to provide superior loft and insulating properties for those who seek lightweight warmth in even the coldest conditions. Down is also nearly weightless, which allows it to instantly adjust to your body temperature and provide maximum breathability in any season.

Luxury duvets also come in hypoallergenic down alternative or synthetic materials for fill options. These are great choices for anyone who is sensitive to goose down fill material or who is allergic to dust mites and other irritants.

Duvet Inserts: Down Fill vs. Alternative Fill

Wondering About Fill Power

Fill power is a measure of loft and warmth that applies to down comforters only. Down clusters are graded according to their fill power or loft, which gauges their ability to regain their original volume or loft after being compressed. The higher the fill power, the loftier, lighter and warmer the comforter. Higher fill power translates into superior down comforters that will last in beauty and performance for years to come. We use a hypoallergenic cleaning and sterilization process to remove dust, dirt, and other impurities during manufacturing.

We don't use fill power measurements for alternative fill such as maize or microfiber.

The Mulberry Park Silks Duvet Collection

Model with Duvet Insert

Lily Siberian White Goose Down Duvet Insert

The ultimate down duvet, the Lily Siberian is filled with the highest quality, large cluster, Siberian goose down. The Lily Siberian's cover is made of environmentally friendly Lyocell/Tencel® fabric for lightweight, breathability; a cool touch; and a luster and luxurious drape that's similar to silk. The 10" baffle box construction ensures even distribution of fill.

Fill Power: 850

Best for: Ultra luxurious year-round use.

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Lily Siberian White Goose Down Duvet Insert


Calla Lily Hungarian White Goose Down Duvet Insert

This luxurious down duvet is filled with large, lofty clusters of Hungarian white goose down from mature geese. The cover is made from 100% cotton sateen fabric; the edges are finished with double stitched piping. The 10" baffle box construction ensures even distribution of fill for comfort and performance.

Fill Power: 750

Best for: Year-round use for anyone who loves a fluffy comforter in down.

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Calla Lily Hungarian White Goose Down Duvet Insert


Maize Down Alternative Duvet Insert

The Maize Comforter is a unique duvet insert made from a cotton sateen shell with an aloe vera finish and filled with corn cells. Maize is a sustainable fiber that has natural cooling properties and the ability to absorb moisture to ensure a dry and comfortable sleep environment. This comforter can be used year round.

Fill Power: n/a

Best for: Those who enjoy the snug feel of a thicker comforter. Perfect for a cold sleeper or anyone in a cold climate.

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Maize Down Alternative Duvet Insert


Alpine Loft Down Alternative Duvet Insert

The Alpine Loft finely spun microfiber duvet is an affordable and allergy friendly down alternative comforter. Made with cutting-edge fiber technology, this duvet insert simulates the feel and lofty properties offered by a down duvet. Fluffy and comfortable on your bed Alpine Loft is perfect for anyone sensitive to feather or goose down but craving the feel of down in their luxury bedding. Comfortable 10" baffle box construction. Machine washable with mild detergent

Fill Power: n/a

Best for: Year-round comfort in an affordable down alternative.

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Alpine Loft Down Alternative Duvet Insert


Side-by-Side Comparison of High Quality Duvet Inserts

Whatever your favorite fill material or price point, Mulberry Park Silks has a comforter to fill your needs. Our design team is happy to help you select the perfect duvet for your bed. Check out our blog to learn more about our silk duvet cover collection.


Lily Siberian
White Goose Down

Calla Lily Hungarian
White Goose Down

Natural Maize
Down Alternative

Alpine Loft
Down Alternative


High Quality Large Cluster Siberian White Goose Down Large, lofty down clusters from mature Hungarian White Geese Maize Fiber Finely Spun Microfiber

Fill Power

850 750 N/A N/A



100% long-staple cotton single thread

100% cotton sateen

100% cotton, long-staple, single thread


Champagne White White White

Country of Origin

Hungary Hungary Austria Austria


Queen Size $1,040 /
King Size $1,270
Queen Size $630 /
King Size $736
Queen Size $562 /
King Size $692
Queen Size $180 /
King Size $204


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Mulberry Park: Accessible and Affordable Luxury Silk

We founded Mulberry Park with one simple mission: to design the highest quality silk items in the market and offer them at an affordable price. And we've done just that, with a full range of silk products made from 100% pure mulberry long strand silk fabric. The silk fabric used for our silk sheets and silk pillowcases has also been OEKO-TEX® Certified (Standard 100) to be free of chemicals.

Visit us online or call us at (800) 860-1924 to learn more about our silk sheets, silk pillowcases, duvet covers and shams, and real silk accessories including sleep masks, travel pillows, and silk hair scrunchies.