Customize your comfort with our hand-stretched silk-filled cores—now available on their own. Designed to pair seamlessly with KAILU duvet covers, each insert features a precise 1-to-1 tie system that aligns with the interior ties in every KAILU cover, keeping the core securely in place with no shifting or bunching.

Crafted using centuries-old techniques, each insert is filled with layers of hand-stretched mulberry silk. These delicate layers are carefully stacked and stitched to create an even, breathable weight that naturally regulates temperature while eliminating cold spots. The result is lightweight warmth without synthetic fill—just pure, natural comfort that adapts with you throughout the night.

Use a single core for lighter coverage or layer two together for additional warmth during cooler seasons. Whether you're upgrading to a dual-core setup or simply refreshing your bedding, our silk cores offer flexibility to match your sleep preferences.

Encased in smooth cotton sateen for durability and easy care, each insert is compatible with all KAILU duvet covers.