Eberlestock Airbase Long Underwear Top in graphite color. As always, Eberlestock has set the bar for everything they do. This baselayer, made in Finland, go ahead you can say "WOW", finally a product not made in China! Thank you Eberlestock. Finland manufacturers know how to stay warm when it gets cold, you can wear just about what ever you want over top of this product and stay comfrotable and dry in any weather. Plus, if you are out there and the day gets warmer, you can expose this baselayer and "Wala" you get instant full-blown cooling. Made from polypropylene with silver ion scent control. We will not be going into the wilderness with out this product. Please email us, facebook or do a review on this product to let us know how it worked for you.