Casper's 20% off memory foam mattress topper sale is the best I've seen — here's why

A woman relaxes on the Casper Comfy Mattress Topper
(Image credit: Casper)

As a sleep writer, I know that the Casper Comfy Topper is the mattress topper to use if you're looking to add softness to your bed — but it's not always on sale. Luckily, I've spotted that you can now save 20% on the Comfy Topper at Casper, with a queen now $239.20 (was $299). 

If your bed needs a refresh, but you're not in the market for this year's best mattresses, then a mattress topper is the next best thing. The Casper Comfy Topper features in 2024's best mattress toppers guide for the cushioning comfort it delivers to side sleepers. 

Extras include a 5-year warranty, free shipping, and a 30-night sleep trial. I reccomend acting fast on this deal, as it's the best I've seen on the Casper Comfy Topper. Usually, this topper is either sold at full retail price or 10% off, so I don't see the current discount being beaten - even in the upcoming Labor Day mattress sales

Casper Comfy Mattress TopperWas: Now: Saving:up to $67.80 at Casper

Casper Comfy Mattress Topper:
Was: $199
Now: from $159.20
Saving: up to $67.80 at Casper
Our testers for our Casper Comfy Mattress Topper review rated this bed topper as one of the best memory foam mattress toppers for adding comfort to your bed. Side sleepers will love the three inches of cushioning foam that relieves pressure in the shoulders, hips, and knees. Reviewers were also impressed with its cooling features, perforated, airflow-boosting foam and breathable knit cover. Back and stomach sleepers, however, should look for a mattress topper on the firmer side. 

Benefits: Free shipping | 30-night sleep trial| 5-year warranty

Price History: This topper isn't always on sale at Casper, and when it is, it's only ever 10% off, so this 20% off deal isn't one to miss. While there are some bigger price drops on this mattress topper on Amazon (a twin Casper Comfy Topper is currently down to $120 at Amazon), their deal does not include the 30-night sleep trial. Plus, you also have to contact Amazon's customer service to request the 5-year manufacturer's warranty). 

Are mattress toppers worth it?

Mattress toppers are worth it - provided you buy the right one for your sleep style, body type, and bed. To get maximum comfort and support out of your topper, buy one that's no shorter than two inches as it will be too thin to make a real difference. On the other side, a mattress topper over four inches thick will feel too squidgy.

The best material for making a mattress softer is a topper made from memory foam, due to the foam's body-contouring feel. You can also choose an organic latex mattress topper if you want a more responsive, breathable feel with non-toxic, anti-microbial materials. They're also a great, more affordable alternatives to the best organic mattresses

Frances Daniels
Senior Sleep Staff Writer

Frances Daniels is a PPA-accredited journalist and Sleep Staff Writer at Tom's Guide with an MA in Magazine Journalism from Cardiff University. Her role includes covering mattress and sleep news and writing sleep product reviews and buyer's guides, including our Best Hybrid Mattress 2025 guide. She is hugely interested in the relationship between good sleep and overall health, interviewing a wide array of mattress and sleep experts to create well-informed articles about important topics such as nutrition, sleep disorders (from sleep apnea to night terrors), lucid dreaming, sleep hygiene, and mattress care. She is also our specialist on mattress toppers — producing mattress topper reviews and taking care of our Best Mattress Toppers 2025 guide — and takes the lead on all content related to fiberglass-free mattresses for a clean, non-toxic sleep. Outside of Tom's Guide, she has written for Ideal Home, Homes & Gardens, and Marie Claire. 

Read more
Mattress topper deals
Best mattress topper deals for January 2025: Up to 40% off ahead of Presidents' Day
Brooklyn Bedding 3" Latex Mattress Topper
I'm a mattress topper expert — here's everything I've learned about how to choose the right one
Helix Dual Comfort Mattress Topper with a price drop deals badge
Helix's new mattress topper is already 27% off in Presidents' Day sales — here's why couples will love it
One of the best cheap mattress toppers, the Linenspa Memory Foam Mattress Topper on a bed
The best cheap mattress toppers under $50 in 2025
A hand feeling the Casper Comfy mattress topper next to someone fitting the Puffy Deluxe mattress topper
Puffy vs Casper: which memory foam mattress topper is better for side sleepers?
A mattress with a deal badge to indicate that it is reduced in the Casper mattress sales
The best Casper mattress sales for March 2025: Up to 30% off mattress bundles
Latest in Mattress Toppers
A woman's hands placing a clean mattress pad on top of a mattress
5 signs that a bed topper is actually a mattress pad — and why that’s a problem
Helix ErgoAlign mattress topper on top of black mattress on wooden bedframe in bedroom with plant, gold bedside lamps and grey rug
Helix launch two new mattress toppers for advanced cooling and back pain relief
The new Helix Dual Comfort Mattress Topper in a bedroom
Helix launches anti-sleep divorce cooling mattress topper for couples with different sleep needs
Helix Dual Comfort Mattress Topper with a price drop deals badge
Helix's new mattress topper is already 27% off in Presidents' Day sales — here's why couples will love it
The Helix GlacioTex Premium Mattress Topper with a deals badge
Saatva's mattress toppers are never on sale — 3 Presidents' Day deals I'd shop instead this weekend
The Tempur-Pedic Tempur-Adapt Topper + cooling with sale label
I'm a bed tester with back pain — 3 mattress topper deals I'd actually buy this Presidents' Day
Latest in Deals
Amazon Big Spring Sale banner
17 best early Amazon Spring Sales you can shop now — here's what I'm adding to my cart
Amazon Big Spring Sale
Amazon Big Spring Sale — my 9 favorite deals on iPads, Samsung and Fire tablets
Classic Glitter Clogs Crocs in Silver Quartz on gradient blue background with Tom's Guide blue deal Price Drop badge on top right corner
Massive Crocs sale is live from $21 at Amazon — here's 15 deals I’d add to my cart ahead of Amazon's Big Spring Sale
spring sale glasses deals
Best Amazon Spring Sale smart glasses deals — my favorite AR glasses are cheaper than ever
Google Pixel 9 Pro deal
Forget Pixel 9a — get the Google Pixel 9 Pro for $250 off at Best Buy right now
Sharge Shargeek 170 portable charger
Amazon Spring Sale alert — this massive 24,000 mAh power bank is 40% off and it's the best we've tested