Overboots for Winter on Mt. Rainier

looking for some advice and input. Mostly been mountaineering in the summer around the cascades and thinking of going for gib ledges on Mt. Rainier this winter. I have la sportiva g5 evo boots, and am wondering if overboots are a good call and/or sufficient for that kind of outing.

thanks!

The G5 is not sufficient, you want a double boot. Adding an over boot would be sufficient 

Allen Sanderson wrote:

The G5 is not sufficient, you want a double boot. Adding an over boot would be sufficient 

Thanks!