58% Polyester / 30% Recycled Polyester / 12% Elastane. Opti•Dri™ Wicks Away Moisture To Keep You Dry.. Stretch To Give Full Range Of Motion. Ribbed Collar. Single Knit Fabrication Creates A Lightweight Material That Is Flexible And Comfortable. Model Is 6'1" And Wears Size M. Machine Wash. Opti-Dri™. Transfers moisture away from your body to keep you cool and dry.