Customize your comfort with our hand-stretched silk-filled cores—now available on their own.
Designed to pair seamlessly with our duvet covers, each silk-filled core features a 1-to-1 tie system that aligns with interior ties on every KAILU cover, keeping the insert securely in place with no shifting or bunching.
Crafted using centuries-old techniques, each insert is filled with layers of hand-stretched mulberry silk, stacked and stitched into place to create an even, breathable weight—no cold spots, no synthetic fill, just natural comfort that adapts with you.
Use a single core for lighter coverage or layer two together for extra warmth. Whether you're upgrading from a single to a dual-core setup or simply refreshing your insert, our silk cores give you the flexibility to sleep your way.
Temperature-regulating. Long-lasting. Rooted in heritage.
Each insert is encased in cotton sateen for durability and ease of care. Compatible with all KAILU duvet covers.
RAW SILK CORE(S)
- 100% long-strand mulberry silk fill
- 100% cotton fabric casing
- Allergy resistant / dust-mite free
- Naturally temperature regulating
- Supremely breathable
- Includes 8+ ties to correspond with duvet cover
- Hidden zipper closure
DUVET COVER
- 100% cotton
- 400 Thread count
- Sateen fabric: classic 4 over 1 sateen weave using cotton yarn in both warp and weft, elegant drape, slight sheen
- White fabric, with choice of white or black piping
- Perfectly fitted to raw silk cores to prevent gaping and bunching
- Includes 8+ ties to keep raw silk cores in place
- Hidden zipper closure
Proudly handmade in China. Designed in San Francisco.
Twin: 66 in. x 86 in.
Queen: 86 in. x 86 in.
King: 94 in. x 104 in.
Emperor: 98 in. x 110 in.
We recommend Emperor for a Cal-King bed, and Queen for a Full bed.
To maximize the effectiveness of silk filling, our duvets have been designed to “float.” If you prefer a draped style or wish to tuck it under your mattress, we recommend choosing the next size up.
Our silk cores are a summer to all-season weight — ideal for warm sleepers, milder climates, or those who prefer a lighter feel year-round.
For more warmth, layer two cores together to create a plush, winter-weight feel. For the complete setup, explore our Heritage Duvet Sets, which include both silk insert(s) and duvet cover.
