The inner spring mattress is, just like the pocket spring, a mattress with metal springs. The mattress with innerspring is the variant in which the springs are connected to each other with a spiral wire. These mattresses have a top layer for an even better pressure distribution of the body.
Although a pocket spring mattress provides better support, an inner spring mattress does have some advantages as described below. So if you are a lover of a softer and springier mattress, then a bonnell innerspring mattress might be the right choice for you.