good productI purchased this because Runners World recommended this brand of mask for runners. The review from RW said that it was so lightweight that after a while the wearer would not know it was there.I have worn this everyday for a week while running, doing weight training, and doing Yoga. And while it is lightweight, comfortable, suits the purpose, and is overall still worth 5 stars. It is not a great mask for running or doing heavy exercise where you may need to breathe out of your mouth or not have the mask MOVE into your nostrils everytime you take a deep breath.I will keep this product and I stand by the 5 stars but I will not be using it while running as the mask DOES move into my nostrils while I'm breathing (mile 5 gets hard and I started to breathe deeply, getting a bunch of mask up my nose was not good), it DOES NOT wick water when exercising (not only was sweat dripping from my face, arms, and legs) instead soaking up all the water on and around my face and neck.Great product for protection, not a good product for running and heavy exertion.Nice feel and look. I like that it’s adjustable but the inner layer makes it difficult to breath while exercising. It constantly bunches up and I have to readjustThis is definitely a good mask for when I want to be able to breathe but I'm not actually going to be around a lot of people. It is not the most safe though, so keep that in mind if you are going to be around people.You know how you get a mask that you just like? This is one in my rotation of masks that I like to wear. It is a nice size - not too big or small but it feels like it covers the bottom of your face. The ear straps are great that they are adjustable. I keep having the problem with non-adjustable straps becoming too loose after half way through the day. These stay put and you can tighten them up to where they feel more comfortable. I feel like it has more coverage than some of my smaller masks. You can also talk with this one on and it doesn't rub your face. It claims to have some material that resists germs and I'm not sure about that, but the fabric is nice. It doesn't make me itchy or rub in the wrong place. You can also talk with it on better than some of my other masks. I have to wear one all day at work, so this is one that I am happy when it's washed and I can wear it again. I'm also in the process of making Cricut stickers that I'm going to iron on this one and it seems like the fabric will handle the heat.This mask was okay. I don't notice that it's easier to breathe in compared to my KN95 masks; actually those are more comfortable because there is space between your face and the mask. They are hot though so I this one may be better in that regard. It's lightweight and washable, which is a plus.I have been looking for a good workout friendly mask. I do CrossFit and have been using a gaitor but it falls down a lot. The reviews for this one were so good, so I gave it a try. The fit was good but I sucked it in every time I tried to breathe. Even when I wasn’t doing high intensity stuff yet. I had to take it off and put my gaitor back on during our warm up. It has two layers too, so it’s pretty thick. I wear it when I’m walking in public places still but unfortunately, it did not work for me and my workout.I use the mask while working out. It fits well. Only negative is that it would be nice to have a nose wire. I wear glasses and so I have to remove them to keep from getting all fogged up. Nice light weight design. The chin gets wet from sweat but I guess that is the proof you need to show you had a good workout.