Otherwise known as net curtains 
We live in a ground floor flat with very large windows. I have gorgeous thick curtains but obviously these are only shut in the evening. I would LOVE wooden blinds but can’t afford them yet. We had bamboo blinds for a while but after problems with condensation, they’ve gone mouldy. Condensation issue is sorted now and I need a cheap solution to stop people looking in our front room as they walk by. I don’t really want to spend much on a temporary-ish solution until o save up for blinds and have noticed some of the flats in our area have sheer curtains instead of blinds - these flats are rented by younger people (younger than me anyway ) so I was thinking of doing the same. But I can’t help but think they’re super outdated, because they definitely were when I was growing up in the 90’s!