Merino resists odor and feels warm when damp but wears out faster; synthetic dries quicker and lasts longer, and a light sun hoody doubles as base layer and skin protection on exposed trail.
11 base layers compared by published weight and price →ranked kind by kind: base-layer bottoms, base-layer tops · lightest of the base-layer bottoms: Zpacks Octa Fleece Thermal Bottoms at 3.7 oz · price per ounceSome links here are affiliate links: if you buy through one, we may earn a commission at no extra cost to you. Rankings follow published figures, never commission. As an Amazon Associate I earn from qualifying purchases. How this works
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