Free to your door
Free delivery to Canada and the USA. Processing takes 3–5 business days, followed by an estimated 4–9 business days for delivery. See details for international processing and timing exceptions.
Delivery detailsMake it the right choice
Check the measurements and included pieces before ordering. Need help with a particular size or fabric? Ask us about this item.
Check the size guideChange plans before dispatch
You can cancel for a full refund before your order is dispatched. Email us as soon as possible with your order number.
Cancellation & return detailsA closer look
Material & feel
Material & feel
Unbleached cotton & upcycled materials
Available in Summer, Fall and Winter thicknesses.
Description
Description
The WhisperLinens Comfort Duvet Insert is designed to be the perfect match for our luxury bedding sets. Made with all-natural upcycled materials, this insert delivers the ideal balance of softness, fluff, and breathability for restful sleep every night. It is 100% vegan, cruelty-free, bleach-free, and antibacterial, making it a safe choice for sensitive skin and allergy-prone sleepers. Available in three thicknesses – Summer, Fall, and Winter – it ensures comfort in every season.
Features
- 4 Corner Loops to keep your duvet cover in place
- Hidden Zipper for a smooth, clean look
- Unbleached Cotton – gentle on sensitive skin
- 100% Vegan – sustainable and cruelty-free
- Long-lasting durability
- Antibacterial – great for people with allergies
- Super soft, lightweight, and breathable
- Machine washable (gentle cold cycle; hang dry recommended)
Helpful Tips
- For maximum fluff and volume, choose the Winter thickness.
- If you live in a mild climate, Summer or Fall thickness will be ideal. (The insert shown in our product images is Fall.)
Available Sizes – Perfect Fit for WhisperLinens Duvet Covers
- Small: 150x200 cm (60x80 in)
- Medium: 200x230 cm (80x90 in)
- Large: 220x240 cm (86x94 in)
Looking for matching pillows? Discover our Plant-Based Pillow Collection, made with the same natural vegan materials for the ultimate sleep experience.
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US bedding sizes, made simple
This guide helps you choose the right size for a comfortable, well-fitted set. Measure your mattress, compare it with the chart below, and you are ready for softer sleep.
How to use this guide
A few quick steps to find your perfect match.
1
Measure your mattress
Note the width and length of your mattress so you know which US size you are working with.
2
Check the depth
If your mattress is extra deep, allow a little extra room when choosing fitted sheets.
3
Compare with the chart
Match your size to the row below to find pillowcase, duvet, and sheet dimensions.
4
When in doubt, ask
If you are between two sizes, sizing up or reaching out to support is an easy way to be sure.
US size chart
All measurements in inches (width × length). Our store labels also map to Small, Medium, Medium+ and Large.
| Size | Pillowcase | Duvet Cover | Fitted Sheet | Flat Sheet |
|---|---|---|---|---|
| Twin / Twin XLSmall | 20 × 30 | 60 × 80 | 47 × 80 | 71 × 90 |
| Full / DoubleMedium | 20 × 30 | 80 × 90 | 60 × 80 | 96 × 98 |
| QueenMedium+ | 20 × 30 | 80 × 90 | 70 × 80 | 96 × 107 |
| King & Oversized QueenLarge | 20 × 30 | 86 × 94 | 70 × 80 | 96 × 107 |
Tip: on smaller screens, the table turns into readable size cards. Bed skirts match the fitted sheet size, with an added 15 in (40 cm) skirt drop.
A little extra help
Not sure between two sizes?
Going up a size gives a more relaxed, draped look. If you prefer a closer fit, stay with your exact mattress size.
Check your mattress depth
Pillow-tops and deeper mattresses need a fitted sheet with a little extra room, so measure before you choose.
Match your duvet insert
Pair your duvet cover with an insert in the same size range so it fills the cover neatly and feels cozy.
Need help choosing?
If you are still unsure, our team is happy to help you find the right size before you order.
About our size labels
On some products you may see Small, Medium, Medium+ and Large. These map to the US sizes above: Small = Twin / Twin XL, Medium = Full, Medium+ = Queen, and Large = King & Oversized Queen. Always check the listed dimensions on each product page to confirm.
Please note: dimensions listed above are approximate. Due to manufacturing tolerances and slight differences between production batches, actual measurements may vary by roughly 2–5 cm (about 1 in). Product colors may also appear slightly different depending on your screen settings.
Ready to find your set?
Browse our bedding sets, or reach out if you would like help choosing a size.
WhisperLinens Cotton Comfort Duvet Insert