DISCLAIMER: We understand that individuals and organizations are using our ventless goggles for more than their intended use. We are happy to support the community but we can not make any guarantees that this product will keep you completely safe. Our ventless goggles block most air from getting in but they are not 100% sealed. There are eyelets with miniature 0.07” holes in the corners as well as a slot cut for the head strap. Some customers have suggested using putty or hot glue to fill in these holes if you would like a better seal. We just wanted to be forward and honest about our product to make sure you are fully informed before making a purchase.