Sei Collection | Cotton

SEI is MATTEO’s answer to elevated cotton bedding. Crafted from 600 thread count cotton in a sateen weave, it offers soft structure and subtle sheen. This collection includes fitted sheets, duvet covers, and essentials designed for those who value everyday refinement and high-quality cotton that lasts.

What is MATTEO's Sei fabric?

A 100% cotton sateen at 600 thread count, MATTEO's highest thread count fabric, with a soft face and slightly rougher back, the combination that produces sateen's characteristic silky feel.

Why hasn't MATTEO gone above 600 thread count?

Higher thread counts typically produce a fabric that's stiff and dense rather than one that moves and breathes well, so 600 is where MATTEO drew the line between high count and genuine comfort.

What products are available in the Sei collection?

Sheet sets, fitted and flat sheets, duvet covers and sets, shams, pillowcases, and swatches, plus a custom hospitality version made for the Post Ranch Inn.

Is Sei sateen a good choice for hot sleepers?

Sateen is denser than percale and can trap slightly more heat; if you sleep warm, MATTEO's percale fabrics like Tru or Nap generally breathe better than Sei's sateen weave.