Hi Craig,
 
Thank you for your question. The Simba Hybrid Pro mattress is constructed with memory foam, wool and pocket springs. Wool is a very breathable natural fibre and it is great at wicking away heat and moisture but without and GSM of the wool it may not make much difference.
 

 
Memory foam requires body heat along with pressure to be able to mould to you. This does not dissipate and is retained within the mattress and fed back to the sleeper making them overheat. A cooler alternative to memory foam is Latex. 100% natural latex is much more breathable and durable. 
 

 
We have only one mattress, the Origins Pocket Latex 1500, which has a similar construction to your Simba Hybrid Pro. The overall feel of this mattress is medium to firm depending on your body weight as latex only requires pressure to be able to mould to you which means the lighter your body weight the firmer it will feel.
 

 
There is a company called Latex Sense that has a wide range of latex mattresses both with and without springs in different densities to give you the correct support and comfort you require.
 
I hope this helps and if you would like any further information or would like to discuss your individual needs, please do not hesitate to contact our small friendly team on 0161 437 4419.
 
Kind Regards
Michaela