Update!!!!!!
These things are so much more comfortable than the hard ones that came with the glasses. I do a lot of diy construction work and military construction and these have been a really nice addition to my tool box. When I sweat my glasses do not slide off of my face anymore and normally stay where I put them. The latter been the biggest plus for me.<br /><br />I have two pair glasses, one where these screw and the other pair where they push in, both fail miserably. The hard piece that attaches to the glasses stay put but the soft part that touch your face is what falls off. I have went through all of these since I bought them. I do not recommend.
Rating: 1 stars