Birch's Luxe organic mattress is again our top pick because it's so well-rounded. It's a great organic model that offers good support, but also a good bit of pressure relief (Birch calls it a medium-firm mattress). There's no sag in the Birch Luxe, and I had none of the lower-back pain I associate with softer mattresses. Birch offers free shipping and a 100-night trial period, and all its mattresses have a 25-year warranty. Birch offers an in-home setup and removal of your old mattress through LoadUp; details can be found on Birch's website.