• Coal Nap Duvet Set on Low Platform Bed - Los Angeles Hills Bedroom Editorial, Luxury Cotton Bedding | MATTEO
  • Charcoal Sei Luxury Cotton Sateen Duvet Cover - Front View, LA Hills Lifestyle Bedroom | MATTEO
  • Fig Cotton Sateen Sei Fabric - Close-Up Drape and Weave Texture Detail | MATTEO
  • Coal Sei Cotton Sateen Sham with White Contrast Stitch - Styled on Bed with White Bedding | MATTEO
  • Coal Charcoal Sei Luxury Cotton Fabric - Close-Up Weave and Drape Texture Detail | MATTEO
  • Alpine Green Sei Cotton Sateen Duvet Cover and Shams - Bundled Stack with Quilted Sham | MATTEO
  • Alpine Forest Green Sei 100% Cotton Fabric - Close-Up Weave and Drape Texture Detail | MATTEO
  • Oat Sei Cotton Sateen Duvet Cover with Quilted Sham - Bundled Stack View | MATTEO
  • Oat Sei Cotton Sateen Fabric Swatch - Close-Up Weave and Sheen Texture Detail | MATTEO
  • Smoke Sei Cotton Sateen Duvet Set with Quilted Sham - Bundled Stack View | MATTEO
  • Smoke Black Sei Luxury Cotton Fabric - Close-Up Drape and Weave Texture Detail | MATTEO
  • Night Cotton Sateen Sei Duvet Set - Styled Stack | MATTEO
  • Night Deep Navy Sei Cotton Fabric - Close-Up 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
  • Bark Cotton Sateen Duvet Cover - Styled Bedding Set with Quilted Coverlet | MATTEO
  • Bark Deep Brown Sei Luxury Cotton Fabric - Close-Up Drape and Weave Texture Detail | MATTEO
  • Fig Garment-Washed Cotton Percale Nap Duvet Cover - Styled Bundle with Matelasse Quilt | MATTEO
  • Iris Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Texture, Cool Grey Colorway | MATTEO
  • Coal Sei Cotton Sateen Duvet Set - Stacked with Quilted Sham | MATTEO
  • Dark Charcoal Sei Duvet Cover - Styled Raw Architectural Bedroom with Canyon Views | MATTEO
  • Moon Cotton Sateen Sei Duvet Cover Bedding Stack - Soft Grey Neutral Colorway | MATTEO
  • Moon Sei Cotton Sateen Flat Sheet - Close-Up Draped Fabric Sheen, Soft Warm White Weave Detail | MATTEO
  • Greige Nap Duvet Set - Styled Stack with Pillows and Matelasse Sham | MATTEO
  • Greige Sei Cotton Sateen Flat Sheet - Close-Up Draped Sateen Weave, Warm Off-White Fabric Detail | MATTEO
  • Off White Cotton Sateen Sei Duvet Cover - Styled Bedding Stack with Pillows | MATTEO
  • Off White Sei Cotton Sateen Flat Sheet - Close-Up Draped Sateen Sheen, Warm Ivory Weave Detail | 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
  • White Sei 600 Thread Count Cotton Sateen Flat Sheet - Close-Up Draped Fabric Texture Detail | MATTEO
  • Salt Cotton Nap Duvet Cover with Quilted Sham - Styled Stack View | MATTEO
  • Salt Sei Cotton Sateen Pillowcase in Pale Blue-Grey - Close-Up Draped Fabric Weave Detail | MATTEO
  • White Sei Duvet Set with Ida Quilted Sham - Styled Stack View of Luxury Cotton Bedding | MATTEO
  • White Sei Cotton Sateen Flat Sheet Styled on Outdoor Hanging Swing - California Lifestyle | MATTEO

    Sei Duvet Set

    100% Cotton | 600 Thread Count | Sateen Weave | Garment-Dyed
    Regular price $745.00
    Color:
    Size:

    Frequently Asked Questions

    What fabric is the Sei Duvet Set made from, and why does 600 thread count matter?

    The Sei Duvet Set is 100% long-staple cotton in a 600 thread count sateen weave, garment-washed and dyed with non-toxic dyes, designed and manufactured by MATTEO in Los Angeles. At 600 TC, the sateen weave produces a smooth, silky face with a subtle sheen — the kind of finish found in high-end hotel bedding — while staying below the density threshold where cotton becomes stiff and stops breathing.

    Does the Sei Duvet Set have a hotel-quality finish?

    Yes. The Sei fabric is 100% long-staple cotton, 600 thread count sateen weave, garment-washed for a smooth drape and consistent color — the same specifications that define institutional hotel-grade bedding. Key details: 100% long-staple cotton, 600 TC sateen weave, Los Angeles manufacturing, garment-dyed with non-toxic dyes, hotel-style silky finish for a cool, smooth sleep.

    What sizes does the Sei Duvet Set come in, and what is included?

    The Sei Duvet Set is available in Twin, Queen, and King. A King set includes one King Duvet Cover (108 x 94 in) and two King Sham Singles; a Queen set includes one Queen Duvet Cover (90 x 94 in) and two Queen Sham Singles; a Twin set includes one Twin Duvet Cover and one Queen Sham Single.

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

    Machine wash in lukewarm water with a gentle detergent, separating light and dark colors. Tumble dry on low heat and remove promptly to reduce wrinkling; line drying gives the best results. Do not use bleach or products containing chlorine, alpha hydroxy acids, or benzoyl peroxide, as these will damage the garment-dyed finish.

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