Hi there,

Thanks for replies. I have done a bit of research online, and in terms of natural matresses, I found one that is filled with organic coconut coir and latex and covered in organic wool and cotton- sounds amazing but it is only available in the UK. Here in Oz I could only find organic cotton mattresses (Innerspring with organic cotton filling and outer) - avail at natureschild.com and naturescradle.com (albeit $399, and out of stock). Not sure if its worth the extra cost for natural materials if I'm just going to put a waterproof cover on top...
The main concern I read about was the use of flame retardant chemicals in conventional cot mattresses- apparently the chemicals are quite volatile and have been linked to SIDS. Mind you- everything seems to be linked to SIDS these days- vaccines, co-sleeping etc.