If you've set your Sloom mattress to Soft and noticed you're running warmer at night, you're not imagining it. It's a known trade-off with memory foam, and there are a few practical ways to fix it without giving up the comfort you like.
Why memory foam sleeps warm
The Soft setting on your mattress uses ultra-dense memory foam, which conforms closely to your body for that plush, cloud-like feel. The trade-off is airflow: dense foam has a tighter, more closed structure, so body heat has less room to escape and can build up against the surface you're lying on.
Try Medium instead
The Medium setting uses cool latex foam, which has a more open structure that allows air to move through it rather than trapping heat against your body. It's still supportive and responsive, just with noticeably better airflow than memory foam. If you're sleeping hot, switching your mattress to the Medium layer will likely make a noticeable difference and it doesn't mean giving up comfort or support.
Layer with 100% cotton bedding
What's directly against your skin matters almost as much as what's underneath you. Synthetic fabrics trap heat and moisture, while 100% cotton bedding is breathable and lets moisture evaporate rather than sit against your skin. Pairing a cotton fitted sheet and duvet cover with the Medium latex layer addresses heat from both directions.
Add a cooling mattress protector
Sloom's Cooling Mattress Protector uses thicker, more breathable padding designed for enhanced airflow, so it works with the latex layer rather than against it. It's also machine washable and protects against stains, so it's a practical addition even outside of temperature regulation.
Use an all-seasons duvet
If you'd rather keep your existing duvet than switch it out for the seasons, the Sloom All Seasons Duvet Inner is worth knowing about too. It's made up of two layers, a 2.5 TOG and a 7 TOG, that clip together for winter warmth or split apart so you can sleep under just the 2.5 TOG layer in summer. It's a simple way to stay cool when it's hot without buying a separate summer duvet altogether.
It's not just the mattress
Sleep temperature isn't only about what you're lying on. A few everyday habits make a real difference:
Alcohol before bed raises your core body temperature and interferes with your body's ability to regulate it overnight, which is part of why a nightcap so often leads to a warmer, more disrupted sleep. Staying properly hydrated during the day helps your body regulate temperature more effectively through the night, since dehydration makes it harder for your body to cool itself naturally.
Your bedroom environment plays a role too. A cooler, well-ventilated room, breathable sleepwear, and avoiding heavy layering all help, and it's worth checking that your room temperature is doing as much work as your bedding is.
Putting it together
If you're sleeping hot, start with the mattress: switch from Soft to Medium to get the benefit of latex's airflow. Then layer in 100% cotton bedding and a cooling mattress protector, and take a look at habits like alcohol intake, hydration, and room temperature. Together, these cover both what's touching your body and the conditions around it, which is usually where the real fix is.