I used to sell mattresses for a living, so I know a little bit about them. However, that was 15 years ago, so my information is dated. Having qualified my information with those statements, here goes.
A mattress is simply springs with a cushion topping for comfort. You’re paying for the grade of the spring, the number of springs, and the quality of materials used in the cushion topping.
Mattresses that are nothing but memory foam are rubbish. You need the inner springs for support and durability. That said, it’s possible to get a mattress made of springs with a memory foam top. That might just be a mattress made in heaven.
I’m sorry that I do not have the source to post, but I remember very clearly that “Consumer Reports” did a study of mattresses in the mid-90s. When it came down to it, price mattered. If you shop at a reputable store and pay US$800–900 for a queen-sized set (mattress and box), then you will get a good quality mattress that should last you a good 15 years or longer. I don’t know what size you’re looking for, but when you shop, if you check the queen price that will guide you.
There are 2 numbers you should consider when shopping. They are the gage of the steel wire used to make the spring and the number of springs in a mattress. Both numbers should be as high as possible. Of course, I used to know the numbers by heart, but I’ve slept a few times since I was a mattresses salesman and have forgotten. I do remember this, however. Stearns and Foster brand was the top of the line in the mid-90s. If you can find a store that sells that brand and get that information from a salesperson, you’ll have what you need to know.
The firmness or softness of a mattress should come from the cushion topping and not from the springs. You want the springs to be as firm as possible for durability. Stearns and Foster mattresses in the mid-90s all used the same inner spring, and the only differences between styles was the cushion topping.
About the box, you can get a box spring, which is made of exactly what the name says, or you can get what’s called a European wood box. Or you can get a European style bed that has a flat wood base or a line of slats very close together, and then you don’t need a box at all. You just buy the mattress alone and plop it right on top of the bed. Suffice it to say, it’s normally cheaper to buy the mattress and box set with a metal frame to put them on, than it is to buy a mattress and a European style bed.
Continuing about the box, personally, I prefer the wood box to a box spring. There are two reasons. First, the wood box offers more support. Second, it lasts longer than the box spring.
While shopping you will notice 2 things. You will see that all mattresses are on sale all the time. The regular price is a draw. Never pay the regular price for an inner spring mattress and box set. You’ll also notice that no 2 mattress stores carry the same mattress even though they sell mattresses from the same company. The names are changed between stores even though the mattresses are identical to prevent easy price comparison. If you get the gage number and the spring number and the type of cushion topping, then you will be able to adequately compare the mattresses from different stores.
I hope what I’ve written here makes sense and is not confusing. To conclude, look for a mattress that has springs made of a sturdy gage wire with as many springs as possible and with a cushion top that is the type of comfort you desire either soft or firm. The style of box is completely up to you.