It's not that I can't, I just struggle putting them in (bad experience with cheap coloured contacts for a costume once and it's put me off. Also I know I'll forget to take them out).
I currently have i4s from a lifetime ago when I was sponsored by Dye, but I would need a fan and some anti fog to stop the glasses misting up which is what happened the first time I used them. I also find the mask to be quite difficult to communicate in and would prefer to go with a different solution (Though I do like the ear protection they offer -especially after being hit in the ear twice yesterday!)
These seem like they would be a great option. I need to head to the opticians today anyway so I'll check how much it would be. Thanks.
I think a fan would definitely help, as mentioned above I couldn't see anything through my glasses, so at minimum anti fog spray, but couldn't hurt to couple it with a fan.
Thanks for the replies everyone.