A midlayer is worn while moving, so breathability beats raw warmth: grid fleece and active-insulation pieces dump heat on the climb and trap it on the ridge without the clammy stops a puffy forces.
Some 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
7 items
