Hi ricardo4833,
Latex International makes blended and 100% natural Talalay latex and Latex Green makes molded 100% natural and organic Dunlop latex. Both of them are high quality latex manufacturers.
There is more about the different types and blends of latex in post #6 here and there is more about the differences in “feel” between Dunlop and Talalay in post #7 here but each person may have have a different preference between them.
All the latex you are likely to encounter (either Dunlop or Talalay made from synthetic, blended, or natural rubber) will be certified by either Oeko-Tex or Eco-Institut and I would consider both of them to be legitimate “safety” certifications in terms of having any harmful substances or VOC’s. Both of them are independent certifications and publish their testing protocols. Latex Green is also Oeko-Tex certified and they also make GOLS certified organic latex as well as 100% natural Dunlop (see post #2 here for more about certifications).
Phoenix