This king size memory foam mattress is on sale for under $400

That's a saving of 55 percent, for a king size

The Simmons memory foam mattress is on sale for under $400 for a king size
(Image credit: Simmons)

We know the best mattress sales when we see them, and this one's a winner. Wayfair is offering 55 percent off the Simmons Medium Gel Memory Foam Mattress in its Memorial Day clearance sale right now. That means you can score a King size mattress for only $389.99, with a 100 day trial included. 

Users love the Simmons Memory Foam Mattress for its breathable construction and cooling technology. It comes with an agreeable medium level of support hypoallergenic gel memory foam, and tension relief for back pain. 

Simmons King Size Gel Memory Foam Mattress | Was $874.99, now $389.99 at Wayfair
Save 55 percent -
This cooling gel mattress comes in Twin, Full, King and Queen sizes and is backed by a 100-day trial and 10-year warranty. View Deal

Like many of the best mattresses, the Simmons Medium Gel Memory Foam Mattress comes delivered in a convenient box, and it's designed and assembled in the USA. What's more, it comes with a brilliant 10-year warranty.

Simmons' motion separation technology is designed for sharing. A separation layer isolates movements to your side of the bed, delivering you both a restful and comfortable night's sleep. The mattress is compatible with most bed frames, so it'll fit perfectly into your room if you're looking for extra comfort without a complete overhaul.