Innerspring mattresses offer a buoyant feel thanks to steel coils that strengthen the fiber and foam layers beneath the quilted top. If an all-foam mattress makes you sink in too much or make you feel hot, an innerspring provides extra bounce, stiffer edges, and essentially more airflow. But innersprings are notoriously difficult to purchase, and in the past, you had to go to a mattress store and browse through dozens of different models with confusing names, specs, and features. The WinkBed (luxury firm) and IKEA Hesstun (medium firm) performed best in our tests, as did the other products featured in his innerspring mattress guide. Several products, including WinkBed, are available for purchase online and often come with generous trial and return policies.