What to know about firmness ratings.
													
																	Top firm foam mattress. 
									
	
		
	
																	Before you buy a firm mattress it helps to know how mattresses are rated on a scale of firmness. 
																	The rest of the mattress consists of a 2 inch convoluted foam layer for airflow and cooling a 4 5 inch base foam that reduces motion transfer. 
																	The best mattresses that won t sag for side back and stomach sleepers including memory foam innersprings and hybrids with options to buy in store or online in a box. 
																	Mattresses are rated on a scale of 1 to 10 for their firmness. 
															
													
									
	
		
	
																	Firm mattress types include innersprings latex foam and hybrids. 
																	And another 1 inch copper gel infused foam layer. 
																	The 2 inch top layer is gel infused memory foam. 
																	Now if you are a fan of memory foam mattresses you could have a harder time finding a firm let alone extra firm bed. 
															
													
									
	
		
	
																	On the other hand innerspring and latex are materials are generally more responsive and they can make it easier for the mattress to be a firm.