• Charcoal Sei Duvet Set - Los Angeles Hills Bedroom Editorial, Luxury Cotton Sateen Bedding | MATTEO
  • White Sei Duvet Cover with Ida Quilted Sham - Styled Stack, Luxury Cotton Sateen Bedding | MATTEO
  • White Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Texture Detail | MATTEO
  • Moon Sei Duvet Cover with Ida Quilted Sham - Styled Stack, Soft Grey Cotton Sateen Bedding | MATTEO
  • Moon Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Weave Detail, Warm Ivory | MATTEO
  • Off White Sei Duvet Cover with Ida Quilted Sham - Styled Bedding Stack, Luxury Cotton Sateen | MATTEO
  • Off White Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Sheen Detail | MATTEO
  • Greige Sei Duvet Cover with Ida Quilted Sham - Styled Stack, Warm Neutral Cotton Sateen Bedding | MATTEO
  • Iris Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Texture, Cool Grey Colorway | MATTEO
  • Salt Sei Duvet Cover with Ida Quilted Sham - Styled Stack, Pale Blue-Grey Cotton Sateen Bedding | MATTEO
  • Salt Sei Cotton Sateen Fabric in Pale Blue-Grey - Draped Weave Texture Close-Up | MATTEO
  • Oat Cotton Nap Duvet Cover with Quilted Sham - Stacked Flat Lay | MATTEO
  • Oat Sei Cotton Sateen Fabric Swatch - Close-Up Weave and Sheen Texture Detail | MATTEO
  • Alpine Green Sei 600TC Cotton Sateen Duvet Cover - Styled Bundle with Pillows | MATTEO
  • Alpine Forest Green Sei Cotton Sateen Fabric - Close-Up Weave and Drape Texture Detail | MATTEO
  • Bark Cotton Sateen Duvet Cover - Styled Bedding Set with Quilted Coverlet | MATTEO
  • Bark Dark Cotton Sei Fabric - Close-Up Drape and Weave Detail | MATTEO
  • Night Cotton Sateen Sei Duvet Set - Styled Stack | MATTEO
  • Night Deep Navy Sei Cotton Fabric - Close-Up Weave Texture Detail | MATTEO
  • Smoke Cotton Nap Duvet Set with Shams - Bundled Stack View | MATTEO
  • Smoke Black Sei Cotton Fabric - Close-Up Drape Texture Detail | MATTEO
  • Coal Sei Cotton Sateen Duvet Set - Stacked with Quilted Sham | MATTEO
  • Coal Sei Luxury Cotton Sateen - Close-Up Fabric Weave and Drape Detail | MATTEO
  • Fig Garment-Washed Cotton Percale Nap Duvet Cover - Styled Bundle with Matelasse Quilt | MATTEO
  • Fig Cotton Sateen Sei Fabric - Close-Up Drape and Weave Texture Detail | MATTEO
  • Bay Cotton Sei Duvet Set - Styled Stack with Pillowcase and Quilted Sham | MATTEO
  • Bay Cotton Sei Fabric Swatch - Close-Up Garment-Washed Weave Texture | MATTEO
  • Mica Grey Nap Cotton Percale Duvet Set with Quilted Sham - Bundled Stack View | MATTEO
  • Mica Sei Cotton Sateen Fabric in Soft Grey - Garment-Washed Drape Texture Close-Up | MATTEO
  • Iris Sei Cotton Sateen Duvet Cover - Bundled with Quilted Pillow Shams | MATTEO
  • Greige Sei Cotton Sateen Fabric - Softly Draped Sateen Weave Texture Close-Up | MATTEO
  • Luxury Cotton Bedding Styled on Outdoor Hanging Swing - California Lifestyle | MATTEO
  • Dark Charcoal Sei Duvet Cover - Styled Raw Architectural Bedroom with Canyon Views | MATTEO
  • Charcoal Sei Luxury Cotton Sateen Duvet Cover - Front View, LA Hills Lifestyle Bedroom | MATTEO
  • Coal Sei Cotton Sateen Sham with White Contrast Stitch - Styled on Bed with White Bedding | MATTEO

    Sei Duvet Cover

    600 Thread Count Sateen Bedding
    Regular price $545.00
    Color:
    Size:

    Frequently Asked Questions

    What fabric and thread count is the Sei Duvet Cover made from?

    The Sei Duvet Cover is 100% cotton in a sateen weave at 600 thread count, garment-washed and finished with non-toxic dyes. It is MATTEO's highest thread count fabric, designed and manufactured in Los Angeles for a silky, smooth hand that holds up wash after wash.

    Is the Sei Duvet Cover suitable as a hotel-quality duvet cover?

    The Sei Duvet Cover is built to hotel-grade specifications: 100% long-staple cotton, 600 thread count sateen weave, a crisp knife-edge seam with double-stitch detail, and a hidden YKK zipper closure. The same dense, balanced weave used in fine hotel bedding delivers a cool, smooth sleep surface that maintains its finish through repeated commercial-grade laundering.

    Why does MATTEO cap the Sei at 600 thread count instead of going higher?

    Thread counts above 600 typically produce a stiff, dense fabric that restricts airflow and loses drape. MATTEO uses the same 120/2 Ne yarn in both warp and weft to achieve the Sei's signature silky face without sacrificing breathability or weave balance.

    How do I wash and care for the Sei Duvet Cover?

    Machine wash in lukewarm water with a gentle detergent, separating light and dark colors, and tumble dry on low heat. Remove promptly from the dryer to reduce wrinkling; if you want a crisp finish, press while slightly damp on the Lightweight Cotton or Medium iron setting. Avoid chlorine bleach and whitening agents on garment-dyed colors, as the reactive dyes are not resistant to these products.

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