We have designed the armholes and chest diameter to layer either beneath, or on top of our jackets. If you are on the move or between glassing points, it is easier to shed when worn as a outer layer. Or if max heat retention is needed, it is easily layered beneath our jackets.
* Don't be afraid to run it as an outer layer. This is why we chose our ClusterLoft insulation, a ripstop shell & durable DWR coating.