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

Material Integrity

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

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.

Elevated Luxury

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

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.

Premium Comfort

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

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.

Thoughtful Details

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

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.

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.

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 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.

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.

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

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

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A selection of fabric swatches in neutral tones and wooden samples in various shades arranged on a white surface next to a small vase with eucalyptus stems.

Mindful Materials

Discover the premium, natural materials used throughout our collection of home essentials.

EXPLORE
Four iced drinks in clear plastic cups labeled Café Thuma, including a dark coffee with an orange slice, a creamy tan drink, a dark black coffee, and a green matcha latte, arranged on a light surface.

Café Thuma

Enjoy handcrafted refreshments and speciality bites at our flagship locations.

DISCOVER IN PERSON
A white rectangular plastic frame lies on top of technical drawings and assembly diagrams, with a white plastic component and black screws visible in the background. The scene suggests a design or prototyping process.

Virtual Appointments

Receive personalized guidance and recommendations from our concierge team.

BOOK A TIME
A modern bedroom with a wooden bed, white bedding, a nightstand with a potted plant, and a built-in shelf with decor items. Large text reads THUMA across the image.

Brand Catalog

Explore the collection with the digital version of our first brand catalog.

SEE VOLUME 01
A minimalistic, modern reception area with a neutral color palette, featuring two stone desks, a round lamp, and the word THUMA on the wall above them. A staircase and contemporary decor are visible in the background.

NYC Flagship

Hospitality in the heart of SoHo. Discover Thuma’s curated collection in person at 99 Wooster Street.

WELCOME IN

Elevated design for thoughtful living.

  • Selling Point Icon - Sustainability, Clean Materials - Black

    MINDFUL DESIGN

    Sustainable & eco-friendly.

  • Selling Point Icon - Concierge Services - Black

    CONCIERGE SERVICES

    6-star hospitality.

  • Selling Point Icon - Lifetime Warranty - Black

    LIFETIME WARRANTY

    Designed for longevity.