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Close-up of a white quilted fabric with a square pattern, showing soft texture and clean stitching lines.
A neatly folded, white, quilted blanket or comforter is shown against a plain white background.
Close-up of the corner of a white, quilted comforter or duvet on a plain background. The fabric appears soft and smooth, with subtle stitching visible.
A close-up of a white fabric label with the word THUMA printed in black, attached to neatly folded white bedding or sheets.
Close-up of a white quilted fabric with a square pattern, showing soft texture and clean stitching lines.
A neatly folded, white, quilted blanket or comforter is shown against a plain white background.

Down Alternative Duvet Insert

5/5out of 5 stars4 Reviews

$245

Enjoy free shipping to the contiguous U.S.

In stock and ready to ship in 1-3 business days. Made in limited runs.

Premium hypoallergenic comfort. Filled with an eco-friendly down alternative that mimics the feel and insulation of natural down, the Down Alternative Duvet Insert provides breathable midweight warmth year round.

Key Elements

Material Integrity

Premium hypoallergenic, eco-friendly fill mimics the feel and insulation of natural down.

A soft, white, and fluffy cloud fills the frame, creating a light and airy texture with subtle shadows and highlights across its surface.

Elevated Luxury

Medium fill weight insulates on cool nights and acts as a breathable layer on warmer days.

A woman with short brown hair sits wrapped in a light beige comforter, wearing a white shirt, looking to the side with a relaxed expression in a softly lit room.

Premium Comfort

100% cotton shell paired with fiber fill for just-right comfort and optimal alignment

A neatly made bed with white bedding and a gray headboard sits beside a stack of books, a cup, and a modern floor lamp in a softly lit, minimalist bedroom.

Thoughtful Details

Features four inner corner loops to help secure and keep duvet cover in place.

A person wearing a white shirt sits up in bed, partially covered by light-colored sheets, with their arms resting on the blankets. The room is softly lit.
A bright, minimalist bedroom with a wooden bed, rumpled white bedding, a nightstand, a wooden dresser, and a large window letting in sunlight. A book rests on the floor beside the bed.

Our Design Philosophy

Elevated Design

By stripping away everything but the essential, we uncover the true meaning of each object we design to simplify and enrich life at home.

Quality Craftsmanship

Timeless pieces are perfected through holistic design explorations, meticulous, thoughtful detailing, and mindful material selection. The result is enduring quality intended to be enjoyed each day for a lifetime.

A stack of neatly arranged, light-colored wooden beams with various notches and cutouts, placed on a wooden pallet in a workshop with unfinished walls.

Modern Convenience

Proactive, graceful, and generous problem-solving drives our 6-star mindset. From selection to set-up, an exceptional experience is at the core of what motivates us.

A minimalist bedroom with a wooden bed frame, white bedding, a bedside table, open shelves, a potted plant, large windows with curtains, and neutral tones throughout the room.

Mindfulness

With deep conviction to disrupt the global furniture waste cycle, we consider each design holistically, prioritizing sustainability in each step of the manufacturing processes. Learn more

Stacked wooden planks with intricate notches and grooves, arranged in a neat, repetitive pattern. The light-colored wood creates an orderly, geometric appearance.

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