Darn Tough Mountaineering Over the Calf Size:M (8-9.5) Exit pupil distance (eye relief)

Exit pupil distance (eye relief) (mm): 19

paired with a Bilight midsole

or damn-near perfect solution

Life cycle: 1

Darn Tough Mountaineering Over the Calf Size:M (8-9.5) Exit pupil distance (eye relief)If youre out there in the cold, you need the Mountaineering sock. Ofering the same Streamlined performance fit as it's Micro Crew brethen, but with greater lower leg insulation and protection. Chock full of Merino Wool warmth. These socks keep you moving up when the rigors of the trail get you down. After all, a lifetime warranty on a sock says a whole lot, and knowing that you can expect years of everyday wear is a pretty serious bonus.