This mask is light, breathable and above all adaptable. I work outdoors, in an active environment and this mask is an absolute god send, when running around. It stays secure on my face and I can adjust the fit from loose to snug. It even fits underneath my Samshield horse riding helmet and my sunglasses without fogging them up. My previous mask lasted 7 months of everyday use, being washed 4-5 times a week. So they are incredible hardy. My package was delivered to me on the same day I ordered, and the masks came in nice sustainable packaging.