Extreme warmth level 4.0, Odor control, Outside:70% Micro Polyester,30% Merino Wool, Inside:100% Micro Polyester, 180 gsmWicking, fast-drying, breathable and no itchRetains heat and radiates heat back to the body, UPF rating 50+Moves moisture fast, Soft no-itch wool, ClimaSense is bluesign approved
