Seaweed Duvet Cover

Seacell™ combined with a bio-active collagen layer creates a sleeping surface that supports skin hydration and reduces irritation, measurably, across a full night of contact.

The cover that gives back.

The Bio-Active Duvet Cover by byMatter pairs cotton with Seacell™ fiber in a 500 thread count sateen weave, then adds a collagen coating that works in direct contact with skin. The result feels like a luxury hotel staple and functions like a skincare step you don't have to think about. Fits true to size.

What's Inside

• Material: Cotton / Seacell™ (Ascophyllum nodosum) / Collagen layer
• Weave: 500 thread count sateen
• Algae source: Iceland
• Made in: Japan