Casper Down Duvet review

Casper's Down Duvet is a straightforward down insert with a 100% cotton shell and ethically sourced down held in sewn-in chambers. The full-weight version is $349 regular and the Light-Weight version, which Casper recommends for spring and summer, is $249 regular, and both were 10% off on November 13, 2026. Casper also sells Down Alternative Duvets at $229 regular and $189 for the lightweight version. Sizes are limited to Full/Queen and King/Cal King, so it will not fit a twin bed, and the page lists no fill power. It ships in 1 to 2 business days with free shipping. The product page shows a 3.9 rating from 147 reviews, the lowest average and smallest review count in this list. For a shopper already buying a Casper mattress and bedding in one order it is convenient, but on materials and price the Brooklinen and Quince down inserts give more for less. We compared documented features and published prices and did not run sleep tests.

Who it is for

Casper mattress owners buying a full bed setup

Price

From $249 regular for the Lightweight Down Duvet on Casper's US store as of November 2026 ($224.10 on sale); full-weight from $349.

Lightweight Down Duvet $224.10 Comp. Value: $249
Quoted from the vendor pricing page on November 13, 2026.

Key features

• 100% cotton shell with ethically sourced down
• Sewn-in chambers keep the fill in place
• Full-Weight and Light-Weight down versions
• Down Alternative versions from $189 regular
• Sizes Full/Queen and King/Cal King

Strengths and weaknesses

• Strength: Lightweight version suits spring and summer, per Casper
• Strength: Ships in 1 to 2 business days with free shipping
• Strength: Down and down alternative options on one page
• Weakness: No Twin size, so it does not suit single beds
• Weakness: Product page rating is 3.9 from 147 reviews, the lowest here
• Weakness: No fill power listed on the page

Key facts

• Price: From $249 (Lightweight)
• Shell: 100% cotton
• Fill: Ethically sourced down
• Sizes: Full/Queen, King/Cal King
• Rating: 3.9 from 147 reviews

Where it ranks

Casper Down Duvet is No. 9 in our Best Comforters verdict.