You don’t necessarily need a box spring for your Saatva Classic, but this may be the most comfortable option. Box springs are a rectangular base featuring interior coils and a fabric-upholstered exterior. Box springs were originally designed with innersprings like the Saatva Classic in mind, but they may not provide enough support for heavier all-foam or all-latex models.
Alternatively, you can use a foundation with your Saatva Classic. Foundations don’t feature coils like box springs but they still deliver plenty of support. They also tend to be more durable than box springs. However, one downside to foundations is that they lack the cushioning of box springs and may make your mattress feel firmer than preferred.
If you own a box spring and decide you’d like to use a foundation with your new Saatva Classic, remember that Saatva’s White Glove couriers will remove your old box spring during delivery for no extra cost.