great design [SEP] these silicon brackets were the best product i ever purchased it has made breathing so much easy while wearing masks i normally wear glasses so whenever i wear a mask it always fogs with my glasses esp when it is cold outside after putting these on i am finally able to breathe and not worry about the way the fabric touches my face when i am walking outside and no fogs in my glasses the brackets were lightweight and comfortable to weargreat buy in these difficult times