In reply to James Malloch:
> I'm after a pair of belay glasses and wonder if anyone can answer a few queries.
> 1) I've used a CU pair with contact lenses and they were great - has anyone used any type on top of normal glasses? If so how do they perform?
Fine as long as you can find a comfortable way of positioning both on your head which should be fine as they are quite light.
> 2) Is there much difference between CU and Y&Y for the price (around double for CU)?
> 3) If Y&Y are fine, is there much difference between the more:
I have only used the plastic Y&Y ones. The metallic ones look like they might cope with being abused a bit more but I would go with the plastic ones unless you are particularly clumsy.