Affordable French fashion label Sézane, founded by Parisian entrepreneur-designer Morgane Sézalory, has cult status in Paris. Its chic women's tops, trousers, skirts, dresses, knitwear, outerwear, handbags, shoes and homewares such as bed linen are all sustainably sourced, with many proceeds donated to Demain, its own children's charity (there's also an adjoining charity shop selling past collections).
The boutique's neighbouring concierge, where you can pick up online orders, has fitting rooms to try on purchases on the spot.