Your cart is empty

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.

A person spreading the Down Alt Duvet over a bed

Casper

Lightweight Down Alt Duvet

$143.10

SAVE 10%

Comp. Value:

$159

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 LIGHTWEIGHT: 100% recycled polyester fill that mimics down, now in a lighter version for hot sleepers.

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.

ETHICALLY-SOURCED: All-natural down you can feel good about.

EASY CARE: Fully machine washable, so you can sleep squeaky clean.

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!

Lightweight Down Alt Duvet

$143.10

SAVE 10%

Comp. Value:

$159

Select your size:

$143.10

Comp. Value:

$159

See how our duvets stack up.

Compare our duvets, side by side, to see which is right for you.

Column Spacer	Product Image	Product Image	Product Image	Product Image
	Down Duvet $233.10 Comp. Value: $259	Down-Alt Duvet $161.10 Comp. Value: $179	Lightweight Down Duvet $206.10 Comp. Value: $229	Lightweight Down Alt Duvet $143.10 Comp. Value: $159
Fill	All-Natural Down	Down Alternative	All-Natural Down	Down Alternative
Loft	Full Loft	Full Loft	Low Loft	Low Loft
Best For	Cozy nights	Cozy nights	Spring and summer weather	Spring and summer weather

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.

Shipping, Warranty, & 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: 4.5185184 / 5 from 27 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["weight","comfort","cover","warmth","duvet","blanket","insert"].

Review highlights

Reviews

its heavy

"its heavy"

— Lori K. (3/5)

It’s an adequate comforter, similar

"It’s an adequate comforter, similar to the feel and weight of a real down comforter. I needed to get a down alternative because I’m allergic to feathers. So that’s why I say it’s adequate. My allergy is much improved."

— Alina U. (4/5)

We like it, but we

"We like it, but we wish we bought the heavier one. Still waiting for the duvet cover, so hoping that provides some extra weight."

— Kevin S. (3/5)

I think it is veri

"I think it is veri good but i would like a little like it to br thinner so it doesn't weigh so much"

— Arais v. (5/5)

Too hot

"Too hot"

— Chris R. (1/5)

Good quality, light weight, warm.

"Good quality, light weight, warm."

— Corina N. (5/5)

Very light and comfortable!

"Very light and comfortable!"

— Terry P. (5/5)

Have not used it yet.

"Have not used it yet."

— Agnes F. (5/5)

I really like it. But,

"I really like it. But, is too hot in the outside weather. Overall, I am happy with it."

— Traci c. (5/5)

Please for the love of

"Please for the love of god stop emailing me"

— Alex D. (5/5)

Q&A

Person browsing products in a store with shelves displaying various items.

Find a Casper store near you

Feel the difference in person. Try products for yourself and chat with a Sleep Specialist at a store near you.

Find a store

Two people examining a Casper mattress in a store setting.

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.

Email us Call +1-888-498-0003

Elevate your sleep game

SAVE 35%

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:

$187.20

Comp. Value:

$288

BEST SELLER

SAVE 10%

Waterproof Mattress Protector

From:

$98.10

Comp. Value:

$109

SAVE 10%

Breathable Mattress Protector

From:

$116.10

Comp. Value:

$129

BEST SELLER

SAVE 10%

Original Pillow

From:

$67.50

Comp. Value:

$75

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.