Lifestyle Home PSA: You Can Save $300 on a Casper Mattress from Amazon — Today Only It's the cheapest it has ever been on the site right now By Christina Butan Christina Butan Instagram Christina Butan has been working in media since she graduated SUNY Purchase in 2017 with a bachelor's degree in journalism and the Peter Keller Journalism Prize. She started out as an editorial assistant and news writer for PEOPLE, and then joined the Dotdash Meredith commerce team as an Amazon writer in 2019. She quickly became well-versed in commerce content and worked her way up to becoming a Senior Commerce Writer and Strategist for InStyle, where she pitches, writes, assigns, and edits stories covering celebrity style, beauty trends, editor's picks, and more. People Editorial Guidelines Published on July 15, 2019 12:40 PM Share Tweet Pin Email We independently research, test, review, and recommend the best products—learn more about our process. If you buy something through our links, we may earn a commission. Photo: Amazon In case you missed it, Amazon’s Prime Day deals kicked off today, which means the retail giant is offering tons of price cuts across its site. While you might be feeling a little overwhelmed deciding what exactly to shop with so much on sale from beauty to smart home devices, it’s always a good idea to start with something you actually need — like a new mattress. And right now, the Casper Foam Mattress is $300 off on Amazon, meaning you can grab one of the most raved about mattresses for just under $700 (or 30 percent off). There’s just one catch: The sale is happening for the next 23 hours only, so you’ll have to act fast. This Casper foam mattress is the brand’s most popular design — it boasts over 16,000 reviews on the company’s site for its “just right” feel. Its firmness level is soft enough to be incredibly comfy and relieve pressure points, but firm enough to support your back and hips. That’s thanks to softer foam on the top part of the mattress under your shoulders, and firmer foam towards the core of your body. The mattress is made with four layers of foam and “open-cell hypoallergenic latex ” that lets extra hot air out in order to keep you cool. Amazon Buy It! Casper Sleep Foam Mattress, Queen, $695 (orig. $995); amazon.com Shoppers say the mattress expands to full size quickly after taking it out of the box, and love how comfortable, supportive, and high-quality it is for the price point, especially compared to other higher-end mattresses. The Best Game-Changing Mattresses You Can Buy Online “I’ve been on the hunt for a comfortable and affordable memory foam mattress since I slept on a similar mattress (a more expensive brand) for a few nights a while back. I realized that my general lack of sleep and neck soreness stemmed from my old school spring/pillow top mattress (along with nightmares of squeaking springs that sounded as though they were in physical agony as I climbed in and out of bed),” wrote one customer. “Unable to afford a $4,000 mattress, I started to peruse reviews of more affordable options and eventually decided on the Casper. It arrived promptly and in perfect condition. I allowed a full night for it to ‘expand’ before beginning to sleep on it. I’ve never slept better!” You can get a Casper mattress on sale in all sizes from twin to California king, and choose between a 10-inch or 12-inch height. Whether it’s about that time to change your mattress or you’ve been waiting for a Casper to go on sale, today’s your chance to save big! See More from PEOPLE Shopping Wayfair's Enormous Furniture Sale Has Everything You Could Need for Up to 70% Off, but Only for a Limited Time Winter Coats Are Deeply Discounted Right Now — Here Are Some of the Best Deals Online Shoppers Call This Robot Vacuum and Mop a 'Time Saver' — and It's Double Discounted on Amazon Right Now