I recently got the "Dustproof Unisex Reusable Adjustable Face Protection Decoration Balaclava 5.1x6.9 in" (here). Supposedly it's suitable for daily wear and can be hand washed, so I figured it was worth a shot since I'm outside a lot these days. The elasticity of the buckle makes this face mask adjustable to my facial contour and it ISs one size fits all which is helpful if you're buying multiple masks for your family members with different face sizes like me! It's 100% polyester fiber, water repellent and includes two five-layer activated carbon filters... but does it work?
The answer is: yeah maybe, kind of...? For something that says dustproof on their label, I haven't noticed much difference when breathing heavily while running or cycling—dust still gets through despite what they promise. Furthermore, even though the mask claims to minimize wind and sunlight...it doesn't really do that either; in fact after wearing the balaclava out in a long run yesterday I realized how big chunks of SPF 50 sunscreen had been covered by this thing! All being said - given its price point relative to other available options- I'd call them average at best :)