Hi saidian01,
The organic select line gives you the choice between either 100% natural Talalay or 100% Dunlop in any of your layers but neither one is certified organic latex. They do have the option for certified organic Dunlop on request but I believe this would involve an extra cost (you would need to confirm this with them). The cover and quilting are organic wool and organic cotton.
The natural select line gives you the choice between 100% natural Dunlop (which would be the same as the Dunlop that is used in the organic select line) or blended Talalay. The cover and quilting would be natural cotton and natural wool.
All the latex you are likely to encounter (either Dunlop or Talalay and made with either natural or synthetic latex or a blend of both) are certified for harmful substances and VOC’s by either Oeko-Tex or Eco-Institut and by most people’s criteria all of them would be a very “safe” material. There is more about organic latex and some of the other types and blends of latex in post #6 here.
There is also more about organic and “safety” certifications in post #2 here and in post #2 here.
Phoenix