Prices are shown in the drop-down list for each mattress size (twin through king).  3-layer dunlop latex mattress.  Each layer can be either "S - soft", "M - medium", or "F - firm".  Most customers seem very happy with a soft/med/firm layering (the mattress arrives with a zip-cover and 3 layers, so you can put whatever layer you want on top, rotating the layers to find the softness that feels best).  If you wake up feeling sore or if you sleep on your side, you likely need a soft layer on top to relieve pressure points.  Light-weight people also usually need a softer mattress (due to not having enough weight to allow the mattress to mold to the body shape and relieve pressure points).  My sister and I both like the soft-soft-medium layering best for ourselves (we are in the 100-150 lb range and suffered from back-aches in the past when we used innerspring mattresses).  Our husbands weigh more and prefer a firmer mattress for their side of the bed, for example soft-med-firm (at 180 lbs) or med-med-firm layering (at 220 lbs).  The queen and king size mattresses can be ordered with split-layering (different  layering on one side compared to the other).  If you'd like that option, please just let us know after ordering (it's no extra charge).  The split layering offers the greatest flexibility for changing the firmness once the mattress is at your house (you can rotate the layers around until you find the softness that works best on each side of the bed). If you sometimes sleep in the middle of the bed, you might prefer the top-layer being 1 solid piece, with just the underneath layers being split-layer, for example.

A note from Kate about the layering: "I think MFF would be a true firm and FFF would be an extra firm. MMF would be a medium-firm / SMF would be a medium/ SMM would be a medium-soft, SSM would be a soft and SSS would be an extra soft....that is my opinion based on trying them all as an average sized person - lighter people will find them firmer and heavier people will find them softer."