This Serta Hiatus 12" Memory Foam Mattress drops from $1,099.99-$1,799.99 to $549.99-$899.99 to $412.24-$679.99 when you add the codes TAKE10 and CATCH15OFF at checkout at Kohls.com, plus shipping is free. So, a queen mattress will drop from $1,499.99 to $749.99 to $565.24. This is the lowest price we could find anywhere. The mattress is well-reviewed and features pressure point relief, a deep-sleep top layer, and more. Sales tax is charged in most states.