This mattress is unique in that you can customize your level of firmness; you have the option of selecting soft, medium, or firm, with the additional option of choosing different levels of firmness for each side of the mattress (it does cost extra to do this, but it is an excellent option if you have a bed partner who wants or needs a different level of firmness than you do).
The soft option is the best choice if you want something that is more plush and with greater sinkage (where your body sinks into the mattress). This option is great for side sleepers on account of how the plusher memory foam will contour better to the curves of your body while also offering great pressure relief for your joints and spine. That being said, this softer option is not best for stomach and back sleepers because there is not quite enough support for your spine in those positions.
The medium firmness option is one of the most popular since it offers both body-contouring comfort and great levels of support for your joints and spine. Additionally, a memory foam mattress with a medium level of firmness is a great choice no matter what sleeping position you prefer (whether it’s on your back, side, or stomach) since it can keep your spin in alignment while still providing comfort and pressure relief.
The firm option, meanwhile, offers less sinkage and plushness in comparison to the softer options, making it a harder mattress option. Generally, this option is not as popular because most people prefer comfort over firm support, but this is still a good choice if you want something a little more solid and supportive.
Ultimately, which level of firmness you choose is up to you, but the very fact that you can customize the firmness of your mattress during the buying process is an incredible step forward when it comes to mattress design and definitely helps to set apart the Eight Sleep mattress from its competition in the mattress industry.