V-414 slov-v respirator comes with venus's patented stay cool flow valve which reduces the temperature inside the respirator by 10 f. V-414 slov-v has en 149:2001+a1:2009 approval. Unique fit adjuster for optimum protection and comfort. Superior micro fine filter technology which protects against rspm upto 0. 3micron. Skin friendly fabric for soft feel. Elastic fitted outside filter media is leakproof and avoids puncture in filter media.