With softer foams and extra pillow top wadding for more cushion, the Saatva Classic Plush Soft has a deep, body-hugging feel while still providing optimal spinal support. It's best for side sleepers, lighter weight people, or anyone who prefers a soft mattress. The Saatva Classic Plush Soft is great for relieving pressure points, such as the shoulders, hips, and knees.
On a firmness scale of 1 to 10 (with 10 being tabletop hard), Saatva Plush Soft is about a 3.
Here's more on finding the right comfort level for you.