Reusable, long-lasting breathing protection set which is always at hand! For very small particles such as bacteria, viruses and coarse particles. Set contains silicon half mask SR 100 (half mask is possible to desinficate 4 times per day, in that case the life span is 18 months), particle filter P3 SR 510, pre-filter SR 221 and pre-filter holder. Set is delivered in lockable plastic box.