Yes, one of the main features of a Select Comfort mattress is the ability to adjust the firmness to suit individual preferences. Select Comfort mattresses utilize air chambers that can be inflated or deflated to achieve the desired level of firmness. This allows both partners in a bed to customize their side of the mattress according to their comfort needs. Users can typically make these adjustments through a remote control, a mobile app, or integrated controls on newer models. This flexibility is particularly beneficial for those who may have varying preferences for firmness or firmness needs due to different sleep positions or body types. It is advisable to refer to the manufacturer's instructions for specific details on how to adjust the firmness for your model, and one may find additional information on the current web page.