I'm in Canada too and I've been researching mattresses for the last couple of months for DD. I'll tell you, if you want 100% organic and all natural (as opposed to any synthetic), you're not going to be able to find a twin size for $500-$600. Even a fully organic futon is more than that.
Some things to watch out for when you're shopping:
- if you're looking at latex, beware that most companies sell a combo synthetic/natural latex. Synthetic latex has generally been produced with chemicals. Companies can claim their latex is "all natural" or "100% natural" if it contains ANY amount of natural latex (so yes, they can and DO lie about it. Some are just informed about how the latex they buy is really made).
- again with latex, be careful if they get their latex from India. I read that Indian latex dissolves more easily into rubber (and thus is past the stage where it can be used to process into a mattress) so they add toluene to it to stop this process. From what I can tell, it seems that latex from Malaysia is best (and of course true 100% natural)
- if the bed has wool in it, you should opt for certified organic else it could have chemicals used in processing that remove some of its natural oils that are what give wool it's benefits and fire retardency
- glue to hold foam layers or wood together is often toxic. Best to find a mattress where glue isn't used. Beware of "water based" claims saying that means it's safe. Think about latex paint, it's water-based but still contains VOC's.
- when a company says their mattress is natural or organic, ask about ALL of the mattress contents (using organic cotton piled on top of polyurethane foam somewhat defeats the purpose of buying an organic mattress)
A twin, truly organic futon seems to run around $800 for 4.5" high and closer to $900 for a 6" thick. For a truly natural latex mattress, you're seriously looking around $1300. Add more to that cost if you want it topped with wool. For an organic innerspring mattress, you're looking at $1000 minimum. After I compared quality of mattresses and the content (is it truly organic and natural?), Obasan has some of the better pricing and initially I had thought they were crazy expensive until things came into perspective.
The Natura organic line is nice, but pricey. They use 100% natural latex in their organic line but the rest of their latex mattresses use a combo synthetic/natural. Green Sleep has an awesome mattress but yowza, it's pricey!
Oh, and buying a mattress feels like buying a used car. Untruths and deceit are rampant so ask questions and do your research. You don't want to end up spending over $1000 and have it NOT be organic, natural and chemical free!
I've got so much information in my head that it's hard for me to sort out what to tell you, so if you have any specific questions, please ask away!