Canadian Army Surplus , 2 pc set, Thin light weight and Canadian made Base layer set affectionately referred to as the sleep set. these zippered turtleneck tops with long sleeves and long torso as a base later is soft and comfy. Polypropylene wicks the moisture off your skin and sends it to the next layer up to start evaporation. At the same time it's insulation layer helps to keep you warm. These are meant to be a base layer for your day outdoors and layering up properly is the secret to any long day outdoors in a Canadian Winter. The Army has had a lot of experience with that, you should see why they trust these to do the job. Most wonderful Camp pajamas, will keep you warm enough to get out and pee then back in the sleeping bag before you start to feel cold. (Not what it was intended for though) MEDIUM 34 Waist 40 chest