Most outdoor clothing advice comes down to three garments worn together: a base layer, a mid layer and an outer layer. Each does a different job, which is why we score each one on different things. We build scores from manufacturer specifications, independent reviews and owner reviews, and we do not test products in person.
Outside
Inside
Worn in this order, from the skin outward.
What each layer does
Base layer
The base layer sits against your skin. Its job is to move sweat away so it can evaporate, so breathability makes up 45% of the score in our base layer rankings. Polyester and merino wool tops both appear in our rankings. Prices run from under $60 in the Smart Buy rankings to over $100 in Top Shelf.
A mid layer goes over the base layer and holds in body heat. Warmth makes up 45% of the score. Breathability counts 25%, weight and packability counts 15% and durability counts 15%. You put it on when it is cold and take it off when you warm up, which is why weight and packability is one of the scored criteria for this layer.
45%
25%
15%
15%
45% Warmth
25% Breathability
15% Weight and packability
15% Durability
Outer layer
The outer layer keeps rain out, so waterproofing makes up 45% of the score. Breathability still counts 25%, because a shell that keeps rain out but traps sweat leaves you wet from the inside. Fit and mobility and durability count 15% each. Prices run from under $100 in the Smart Buy rankings to over $250 in Top Shelf.