@Lisa No worries - glad you took it in stride.
@FashIntern - I completely get what you're saying, & admire it. If you're able to do so, then I say go for it. For me personally, I'd like to be able to as well but I also need to be realistic about my situation/ lifestyle etc:
Before moving here, I was admittedly much better about shopping locally sourced clothing since I could easily find my size in-person, even in charity shops. Just before the pandemic, I had also begun to be able to find my size in secondhand clothing here (rather than just on clearance racks or at western fast fashion stores), since most shops max out at XL (I'm a 2XL in Chinese sizes). But then of course we were 'forced' online lol - ASOS used to be a go-to for me, & I've noticed that they've also added a 'sustainability' search option like you saw on Zalando, but my switch to natural fibres meant that much of the fast fashion scene wasn't working for me anymore either. And whilst secondhand clothing is great, I'm often at the mercy of a much smaller collection than at mainstream retail. There's also the environmental cost benefit analysis of having just one unique/ vintage thing shipped to me from around the world.
So at first I felt bad about ordering things online, but @rachylou's observation of ordering coffee beans twice a year echoes my own online purchasing habits now (or at least what I try to follow). I did a big haul in January & then another now. It's not perfect but I'm trying to mitigate my carbon footprint this way (I've also paid a little extra for carbon offsetting before, but stopped because it's more like putting a plaster over the underlying issue...)
I've tried buying secondhand online but ran into the issues above - so I'm trying to limit my searches to local companies, but part of the issue is (as others have mentioned above) that many local sellers & makers still use Chinese dominant fabrics & supplies. Sometimes I get promising info about these fabric etc suppliers, but other times it's a bit of a dead end.
All this to say, I unfortunately don't have a solution either lol - I'm already paying the 'fat tax' for clothes to be made in my size on this side of the world lol, so I do need to be realistic about balancing the environment & my bank balance (especially after going part-time). I've also started looking into Aussie & New Zealand brands to help reduce the number of miles my parcels need to travel, but of course they're in opposite seasons to us right now. I'm trying to get better about purchasing off-season & planning ahead, but it's still difficult to do without making (environmentally & financially) costly mistakes
PS - The free trade thing you mentioned is interesting. Sadly there's all sorts of loopholes being exploited - one thing I've noticed is actually how much *cheaper* it is to buy/ ship things from here to the UK than the other way around. Even for things made in China!