In some countries, you get the mattress inside an airtight/watertight packaging, and you only get a refund if you return it (yourself or for some shipping cost)

In some countries, you get the mattress inside an airtight/watertight packaging, and you only get a refund if you return it (yourself or for some shipping cost) while still in that packaging. This means you can only get a feel for the softness/hardness but not breathability (due to the packaging). On the other hand, it means prices are sane. Personally, I prefer this system to the US one, where the ethical purchasers subsidize the unethical purchasers and unethical, greedy sellers. YMMV.