Hi there -- Thanks for your question. In general, side sleepers need the most softness of the 3 main sleep positions (side, back, stomach). This is because a) in this position your body has more curves that the mattress needs to conform to, and b) in this position you need the most pressure relief.

That said, this is WAY over-simplified. So the answer to what is the right softness level for you to get is going to depend on a more than just your preferred sleep position, including: your softness preference from a comfort standpoint your body shape (eg, string bean, pear, apple, etc.) your weight your overall susceptibility to pressure points (which in turn is related to age, gender, and various health conditions) * and more

Because this can get rather complex, we created a quick but sophisticated quiz that simply gathers the necessary information about your requirements and then uses a proprietary algorithm to determine the target softness level that you should be looking for. It also highlights specific mattress options that will likely be a good match for your more holistic criteria, which will include a number other factors that you may not have otherwise considered. This quiz is an excellent starting point for any mattress shopper, and can be helpful in better understanding your needs no matter where you are in your process.

If you haven't taken it yet, you can find the GoodBed Quiz here: https://www.goodbed.com/mattress-finder/

I hope that's helpful.