<https://www.chempacsolutions.co.uk/ffp1-valved-dolomite-fold-flat-respirator-36569-p.asp#product/36569>
<http://schema.org/description>
"DOLOMITE optional clogging test.Comfort: Vertical Flat FoldedExhalation valve for lighter breathing resistance. Adjustable nose clip for optimized fit."
<https://www.chempacsolutions.co.uk/ffp1-valved-dolomite-fold-flat-respirator-36569-p.asp>