5.6-ounce (190GSM) 80% polyester/20% merino wool plaited wool face - 100% polyester back heathered - Built with Force technology to wick sweat and dry fast - FastDry wicks away sweat - Fights odor - Convenient zip pocket on chest - Strategically placed flatlock seams reduce ...5.6-ounce (190GSM) 80% polyester/20% merino wool plaited wool face - 100% polyester back heathered - Built with Force technology to wick sweat and dry fast - FastDry wicks away sweat - Fights odor - Convenient zip pocket on chest - Strategically placed flatlock seams reduce chafing - Concealed thumb loop - Locker loops - Tagless labels - *Some product may have square logo on chest or silicone rectangle logo on bottom hem