This is a very nice, top quality futon mattress.  We've sold this style for close to 30 years. This mattress is made with two layers of 2" - 1.8 density HR foam and 5 or 6 layers of cotton batting, with a layer of superior Virgin Wool on the top and bottom. It's a very well made and long lasting futon mattress. It works well with Sofa Style Futon Frames, or Platform Beds. It has a 5 (five) year manufacturers warranty and we can not recall ever having a warranty issue on this model.

This is a very dense mattress, but it is a medium-high firm feel.  It is comfortable for sitting, but not so cushy that you sink into it.  For sleeping it provides great support, with enough give to not make you sore.  
It is absolutely not soft, but is a medium-high firm feel.  We have had no problems with uneven compression dips or sags with this mattress.  The wool is a great insulator. It will keep you cool in the summer and warm in the winter. The wool fibers are more coarse than cotton and it wicks away moisture very nicely which makes it a very good choice for use in Humid Climates as well. Most futon mattresses used in Hawaii, (or at least the quality ones), have a wool wrap around them like this mattress.