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Helix Down Alternative Duvet Insert

Designed for maximum airflow and breathability Breathable, all-year coziness
Enjoy a chunky weighted feel for even distribution Zero-clump design
Designed for your unique sleep position Allergy safe
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$95
$118.75

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Meet the Down Alternative Duvet Insert

Stay cozy without overheating with an exceptionally soft, breathable down alternative insert that naturally regulates your temperature for a cozy night of sleep all year long. Pair it with the Helix Cotton Blend Duvet Cover Set and your Helix mattress to complete your sleep setup.

A versatile, all-season option thanks to breathable, premium 3D thermal bonded fiber filling that mimics goose down.

Zero clumping or bunching with 10x10 box quilting that keeps fill evenly distributed.

Hypoallergenic for sensitive sleepers and those allergic to down.

Crafted in breathable, naturally moisture-wicking 100% cotton percale.

Corner loops for easy attachment to your duvet cover.


How Does It Feel?

All season comfort:

  • Keeps you warm without overheating

  • Bouncy, plush comfort

  • Fluffy & evenly-distributed fill

Best for:

  • People who sleep hot and cool alike

  • Every month of the year

  • Indoor temperatures between 59-72F

We chose 250 GSM to hit the sweet spot for year-round comfort without overheating. A duvet insert’s filling is measured in grams per square meter (GSM): a higher GSM is heavier and warmer, while a lower GSM is better for warm climates. If you run hot at night, this is your best option.

A graphic explaining that the Duvet Insert is a 250 GSM, meaning it is great for all season comfort

A closeup of the Duvet Insert across the surface of a mattress

A Fill That Stays Fluffy and Cool

How does our insert stay so fluffy and light? Our sleep scientists designed spiraled, high-quality 3D thermal fiber for a bouncy, cushiony texture and durable resilience that never bunches up or flattens out. 

Breathable & cool thanks to plenty of natural airflow.

Stays light & springy, unlike flat fibers that can feel packed down over time.

Mimics the softness of down without the irritation for the allergy prone.

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