I know this is an old thread, but I have to comment. I'm a customs broker and had a customer order these diapers. Yes they're from China and although it seems they're 'okay' to use from googling the product (that's how I came across this thread), you just never know.
When you buy products that are made in China from a retail store in Canada, they have cleared Canadian Customs as most likely a 'formal entry' which means there are tighter restrictions. When you personally buy items online, from International companies, there are basically no restrictions (for now, there will be at some point in the future) and that makes me nervous. There is no testing done (as there is in Canada), the companies do not have to conform to Canadian standards, on ANY level.
From what I've read this company, Sunbaby, uses fair labour practices. That would be the least of my concerns. What is the product made from? What kind of dyes and perfumes are used? Are they safe (according to Cdn standards) to be used on babies? Are there no harmful chemicals used in the manufacturing process? Are they up to our fire-retardant guidelines? Why are there no companies acting as a supplier in Canada? These are questions you should be wondering whenever you buy things online.
Even if the answers are all satisfactory, I'm not sure if I would believe it. How could I possibly know for sure?
Just be careful. Keep in mind that buying online is truly Buyer Beware and you don't have Health Canada standing behind this product as you would if it was brought in by a company in Canada.
Same thing goes with nutritional supplements, prescriptions, clothing... anything really. Just be careful.