This is the third mask that I could test: A high-quality half mask with two filter connections for various classes of risk, a 3 times as expensive from a brand manufacturer and it here. The expensive mask is of course second to none, but also costs less than 40 EUR and is designed for simple dust works not absolutely necessary. This mask here is certainly not a deal breaker, but my glasses fog barely - at the more expensive so I had to constantly pause. Conclusion: If only every now and then a few hours requires a dust mask and live with a limited shelf life, is so well served.
