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Close-up of the fill inside the Down Alt Duvet. A badge on the image says "Down-Alternative Fill. 100% Tencel™ Lyocell Shell"

Close-up of the corner of the Down Alt Duvet. Text on the image says "Eight loops for less bunching and shifting."

Comparison of the regular, full-weight Down Alt Duvet versus the light-weight Down Alt Duvet. An image shows both next to each other, folded. The light-weight version is thinner than the full-weight.

Casper

Down-Alt Duvet

$259

The fluff you love.

Say goodnight to overheating. Our soft and breathable fiber fill feels like down, but it’s actually recycled polyester. Very cool.

Why you'll love it

HIGHLY BREATHABLE: To keep you from sleeping too hot, we made our duvet’s shell with 100% TENCEL™ Lyocell — a highly breathable, durable fiber made from sustainably sourced wood pulp. Very cool.

SOFT AND RECYCLED: 100% recycled polyester fill that mimics down.

FLUFF STAYS IN PLACE: Inspired by performance outerwear, our sewn-in chamber design hugs your body like your favorite puffy jacket.

THOUGHTFUL DETAILS: Eight total loops (four in Twins) to keep your duvet perfectly aligned in its cover.

Select your down alt duvets:

Select your size:

Twin/Twin XL Full/Queen King/Cal King

In-stock, ships in 1-2 business days | Free shipping

Got Questions

Chat with us now, or give us a call: +1.888.498.0003

Our friendly Sleep Specialists are dedicated to helping you find the mattress of your dreams!

Down-Alt Duvet

$259

Select your size:

$259

Product specifications

Measurements & dimensions

Full/Queen

95" x 98"

King/Cal King

111" x 98"

Materials & Care

Cover: 100% TENCEL™ Lyocell. Liner: 100% Olefin. Fill: 100% Recycled Polyester
Machine wash cold on a gentle cycle with like colors. Tumble dry low.

Warranty, Shipping, & Returns

Free shipping via UPS – additional shipping fees apply to Alaska and Hawaii. Click here to learn more about our delivery process.

You can return your Casper item and get a full refund within 30 days of delivery or within 30 days of an in-store purchase, provided the merchandise is unused and in its original packaging and condition.

Subject to 1-year Limited Duvet Warranty.

Overall rating: 4.4333334 / 5 from 60 reviews.

AI Generated Review Summary

The Down-Alt Duvet is praised for its perfect weight and excellent quality, providing comfort and warmth. However, opinions on the accompanying sheets and duvet cover vary.

Summary topics

Weight: 16%
Quality: 18%

Review topics: ["weight","fit","comfort","sheets","quality","customer service","feel","bed","cover","value","temperature","sleep","duvet","warmth","dog","fluff","addition"].

Review highlights

"Excellent value, quality, experience" — Bonnie
"Perfect fit, Perfect weight" — Robert
"We have slept in many Marriott and Ritz Carlton hotels where the beds and bedsheets are wonderful." — Beth G.

Reviews

Love tge quality

"Love tge quality"

— Mary C. (5/5)

Decent product. Horrendous customer service.

"Decent product. Horrendous customer service. To the point I will never shop here again, and iv been buying the last 10 years"

— Elias S. (1/5)

Warm n cozy

"Warm"

— Vanessa E. (5/5)

Too heavy

"Too heavy"

— Ryan N. (1/5)

I love it. Not too

"I love it. Not too thick. Light or medium weight. And perfect for winter. Great quality and value."

— Bruce A. (5/5)

Thank you

"Thank you"

— Yi H. (5/5)

Warm but cool. Absolutely a

"Warm but cool. Absolutely a must have!"

— Christopher B. (5/5)

Love it!

"Love it!"

— Conrad K. (5/5)

"The full weight duvet is too hot and heavy for the summer"

— Vivi (2/5)

UGHH super fluffy. It has

"UGHH super fluffy. It has a bit of weight which to me enhances the comfortability. Just enough weight to make it feel premium but not so heavy where it feels like a weighted blanket. Pared with the duvet insert, it has elevated my bed and the comfort of it 🥰"

— Gerald C. (5/5)

Q&A

Frequently asked questions

Do I need to use a duvet cover with the Casper duvet?

We strongly encourage using one! Similar to using a pillowcase with your pillow, protecting your Casper duvet with a duvet cover will help safeguard it against sweat, dirt, and stains — and it can easily be regularly thrown in the wash with the rest of your linens.

Will my duvet cover work with my Casper duvet?

We designed the Down Duvet, Down Alternative Duvet, and Humidity-Fighting Duvet to work specifically with the Casper sheets, but you can also use your existing sheet set or duvet cover. Just be sure to double-check the dimensions, as our duvets were consciously designed to be slightly oversized.

How do I care for my Casper duvet?

To care for your duvet, machine wash in a large front-load machine in cold water on a gentle cycle. Then, tumble dry low with dryer balls (or clean tennis balls). Before removing from the dryer, make sure the duvet is completely dry before putting it back into the duvet cover.

Do not iron or dry clean the duvet, as certain chemicals can dry out the down clusters and cause them to break down faster and lose their resiliency and insulation properties.

If you don’t have a front-loading washing machine, don’t fret! Feel free to reach out to our customer experience team for alternate suggestions on how to clean your duvet.

What’s the difference between a duvet and a comforter?

Here’s the deal: a duvet is a type of bedding that’s commonly filled with down or wool materials. A comforter functions as a quilted blanket and is often filled with synthetic fibers. While both can be protected by duvet covers, comforters are more often sold with sheet sets.

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Connect with a Sleep Specialist

Our Sleep Specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.

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White sheet set, folded, stacked on top of two Hybrid Snow Pillows against a white background

Two Hybrid Snow Pillows with a close-up of the inside material of the pillow. Text on the image reads "Down Alternative. Ultra soft foam. Medium feel."

Cool Sleep Bundle

From:

$216

Comp. Value:

$288

BEST SELLER

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What is Comp. Value?

A man unboxes his Casper mattress on his bed frame.

What is Comp. Value?

Our Comparable Value prices reflect the price at which we or third parties have offered this item or a comparable item.

How does Casper create the best value products for their sleepers?

Everything must help sleep and must be tested.

Our team regularly searches the market and tests comparable mattress and sleep products to ensure that ours offer top-quality materials, the most value for your dollar, and the best sleep experience on the market.

Every Casper mattress is designed and assembled in the USA.

As part of the Carpenter Co family, Casper mattresses are manufactured by the largest foam manufacturer in the world—no middle man, no markups, just the best prices for our sleepers.

We don’t rely on gimmicks—just 12+ years of expertise.

With 12+ years in the mattress and bedding industry, the Casper team knows what makes a great night’s rest and what’s just fluff. Our mattresses and bedding are obsessively-engineered and precisely-layered to help you get your deepest sleep ever.

We don’t sleep on getting you the best possible deal.

The Comp. Value shown for Casper products is never set it and forget it. Our team conducts thorough market research every quarter to ensure our comparable value is always accurate to the bedding market and the three most comparable products, so you never have to worry about missing out on savings.

A Casper store associate interacts with a person by a mattress.