Take our most popular lightweight style, Coolmesh ll socks, add merino wool to the outside layer only and you'll have a super lightweight design with all the values of wool - natural moisture absorption, temperature control, no smell and best yet - no woolly scratch against the skin.
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Inner Layer: 70% Dri-Wright® II Polyester, 26% Nylon, 4% Lycra®
Outer Layer: 71% Merino Wool, 24% Nylon, 5% Lycra®
I have only wore these a few times. But the real test was a 36 mile trail run with creek crossings. No blisters after 10 hours.
Merino Coolmesh II "Qtr"