750 Fill Power Down Duvet Insert by Sunday Citizen
Available to Ship: 3-7 Business Days
The 750 Fill Power Down Duvet Insert by Sunday Citizen is the sort of bedding investment you feel far more than you see. Filled with 90% white duck down and 10% feathers, it has a 750 fill power that gives the duvet generous loft without making the bed unnecessarily heavy. Baffle-box construction keeps the filling distributed throughout the insert, while a down-proof, double-stitched shell helps keep it securely contained. The shell itself blends TENCEL™ lyocell with microfiber for a smooth, quiet finish, and corner loops make it easy to secure inside a duvet cover. Mid-weight and designed for year-round use, it creates the full, inviting bed that makes almost any beautiful duvet cover look—and sleep—better.
“A duvet cover can change with the room; the insert underneath should simply be very good. I would rather have one beautifully lofty down insert that stays on the bed for years, then change the covers with the season, the house, or whenever I feel like making the bedroom different.”
-Mrs. Mayfair
Product Details
Material & Finish: Shell: 60% microfiber, 40% TENCEL™ lyocell
Fill: 90% white duck down, 10% feathers
Double-stitched, down-proof outer shell
Color & Pattern: Off White
Dimensions: Full / Queen: 90" W × 90" L
King / Cal King: 106" W × 90" L
Certifications: OEKO-TEX® certified
Care & Ownership
Dry clean only. Do not machine wash, bleach, tumble dry, or iron. Between cleanings, allow the duvet to air when changing the bed and gently redistribute the down through the baffle boxes as needed so the loft remains even. Keep it protected inside a duvet cover during regular use.
Maker / Heritage
Sunday Citizen grew from the meeting of multigenerational textile expertise and hospitality. Its earliest product was developed for a luxury hotel that needed a blanket exceptionally soft enough for guests yet durable enough for repeated use. The family-run company has since built its collection around that same balance of comfort, practicality, and textile development, remaining directly involved in the design and development of its fabrics and home products.
As seen in:
Architectural Digest, Harper’s Bazaar, Business of Home
Shipping & Delivery
Every piece in our collection ships directly from the maker to your door. We have built The Mayfair Hall this way deliberately — by shipping from the source, we reduce handling, minimize secondary packaging, and decrease our overall environmental footprint. It is one of the ways The Mayfair Hall remains thoughtful about how beautiful things travel through the world. Learn more here.
Return & Refund Policy
We hope you are delighted with your purchase. Should you need to make a return or have any concerns, the information contained in our Returns & Refunds page will guide you through our policies and procedures. Learn more here.
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Frequently Asked Questions
We're dedicated to ensuring your order is delivered safely and promptly. Here's a breakdown of what you can anticipate: Shipping & Delivery
We strive for your complete satisfaction with your purchase. You can find our Returns & Refund Policy here.
For damaged, defective, incorrect, or incomplete orders, we offer a replacement. Please find our full Return & Refund Policy here.
Cancellations must be requested within 24 hours of placing your order. Please note that an order can only be cancelled if it has not yet been packed and prepared for courier pickup, or if production has not yet begun for custom or made-to-order items. Once an order has been packed, is ready for shipment, or is already in production, we are unable to process a cancellation request.
No, all orders from The Mayfair Hall ship from within the United States, so they are not subject to international tariffs or duties.
If an item is currently in stock, we'll begin preparing it for shipment within 3–7 business days. Certain made-to-order, custom, or oversized pieces may require additional production time, which will be indicated on the product page whenever applicable.
If assembly is required, you'll find those details within the product specifications, along with any instructions included with your purchase.
We recommend reviewing the dimensions provided on each product page and, when possible, measuring your intended space before ordering to ensure the perfect fit.
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