I've not found that to be a problem, but Harley offer their knits in a standard Shetland as well as a brushed finish.
Unless it's just being worn outdoors, I find anything thicker than a submariner needs to be a cardigan or easily removable. I've got a Black Sheep Knitwear shawl cardigan that's great; if their jumpers are equally heavyweight they'd deal with all but the very worst weather.
I've not found that to be a problem, but Harley offer their knits in a standard Shetland as well as a brushed finish.
Unless it's just being worn outdoors, I find anything thicker than a submariner needs to be a cardigan or easily removable. I've got a Black Sheep Knitwear shawl cardigan that's great; if their jumpers are equally heavyweight they'd deal with all but the very worst weather.