• Luxury Cotton Bedding Styled on Outdoor Hanging Swing - California Lifestyle | MATTEO
  • White Cotton Percale Sheet Set with Four Pillows - Overhead View | MATTEO
  • White Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Texture Detail | MATTEO
  • Off White Cotton Sei Fitted Sheet and Pillow Shams - Overhead Flat Lay | MATTEO
  • Off White Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Sheen Detail | MATTEO
  • Moon Cotton Percale Flat Sheet with Pillow Shams - Overhead Flat Lay | MATTEO
  • Moon Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Weave Detail, Warm Ivory | MATTEO
  • Greige Sei Cotton Sateen Sheet Set with Pillow Shams - Bed Top View | MATTEO
  • Greige Sei Cotton Sateen Fabric - Softly Draped Sateen Weave Texture Close-Up | MATTEO
  • Mica Cotton Percale Tru Flat Sheet and Pillowcases - Top View on Made Bed | MATTEO
  • Mica Sei Cotton Sateen Fabric in Soft Grey - Garment-Washed Drape Texture Close-Up | MATTEO
  • Bay Grey Cotton Percale Fitted Sheet with Pillow Shams - Top View | MATTEO
  • Bay Cotton Sei Fabric Swatch - Close-Up Garment-Washed Weave Texture | MATTEO
  • Salt Cotton Sei Flat Sheet with Pillowcases - Overhead Flat Lay, luxury sateen bedding | MATTEO
  • Salt Sei Cotton Sateen Fabric in Pale Blue-Grey - Draped Weave Texture Close-Up | MATTEO
  • Oat Cotton Sei Fitted Sheet Set with Shams - Bed View | MATTEO
  • Oat Sei Cotton Sateen Fabric Swatch - Close-Up Weave and Sheen Texture Detail | MATTEO
  • Coal Cotton Percale Tru Sheet Set with Pillowcases - Overhead Flat Lay | MATTEO
  • Coal Sei Luxury Cotton Sateen - Close-Up Fabric Weave and Drape Detail | MATTEO
  • Fig Cotton Sateen Sei Sheet Set - Flat Lay View | MATTEO
  • Fig Cotton Sateen Sei Fabric - Close-Up Drape and Weave Texture Detail | MATTEO
  • Alpine Green Cotton Percale Flat Sheet with Pillow Shams - Overhead Flat Lay | MATTEO
  • Alpine Forest Green Sei Cotton Sateen Fabric - Close-Up Weave and Drape Texture Detail | MATTEO
  • Night Cotton Percale Sei Sheet Set with Pillowcases - Overhead Flat Lay | MATTEO
  • Night Deep Navy Sei Cotton Fabric - Close-Up Weave Texture Detail | MATTEO
  • Bark Cotton Sei Flat Sheet with Pillowcases - Top Down View | MATTEO
  • Bark Dark Cotton Sei Fabric - Close-Up Drape and Weave Detail | MATTEO
  • Smoke Tru Cotton Percale Sheet Set with Pillowcases - Overhead Flat Lay | MATTEO
  • Smoke Black Sei Cotton Fabric - Close-Up Drape Texture Detail | MATTEO
  • Iris Cotton Percale Tru Sheet Set with Pillow Shams - Overhead View | MATTEO
  • Iris Sei 600TC Cotton Sateen Duvet Cover - Close-Up Draped Fabric Texture, Cool Grey Colorway | MATTEO

    Sei Flat Sheet

    600 Thread Count Sateen Bedding
    Regular price $345.00
    Color:
    Size:

    Frequently Asked Questions

    What fabric is the Sei Flat Sheet made from, and where is it manufactured?

    The Sei Flat Sheet is 100% cotton in a sateen weave, woven at 600 thread count using 120/2 Ne yarn in both warp and weft for a balanced, silky hand. It is designed and manufactured by MATTEO in Los Angeles. Key specs at a glance:

    • 100% cotton sateen weave
    • 600 thread count, 120/2 Ne yarn construction
    • Garment-washed for immediate softness
    • Finished with a 1/2" double-stitch hem, contrasting white top stitch on darker colors
    • Designed and manufactured by MATTEO in Los Angeles
    • Hotel-grade weave density for a crisp, cool, silky sleep surface

    Is the Sei Flat Sheet a good choice for hotel-quality bed sheets at home?

    Yes. The Sei Flat Sheet is woven at 600 thread count with a balanced sateen construction, the same weave density used in high-end institutional bedding for its durability and smooth finish. The garment-wash process and double-stitch hem give it the crisp, polished surface associated with hotel-grade flat sheets, while the 120/2 Ne yarn keeps the hand soft rather than stiff.

    Does a higher thread count always mean a better flat sheet?

    Thread count measures weave density only; it does not account for yarn quality, fiber softness, or weave balance. MATTEO stopped at 600 thread count because counts above that typically produce a fabric that is stiff and lacks breathability. The Sei uses 120/2 Ne yarn in both warp and weft so the weave is dense and smooth without sacrificing drape.

    What size Sei Flat Sheet fits a Cal King or Full bed?

    MATTEO recommends the King flat sheet (118 x 111 inches) for Cal King beds and the Queen flat sheet (100 x 111 inches) for Full beds. Twin flat sheets measure 79 x 106 inches. You can pair the flat sheet with the Sei Fitted Sheet for a complete set in the same fabric.