Arc'teryx Fortrez Hoody - Men's Elastane,Fleece,Polyester Imported Fabrics: Shell: Polartec Power Stretch with Hardface Technology  88% Polyester, 12% Elastane Balaclava: Phasic AR  100% Polyester Shell: Polartec Power Stretch with Hardface Technology  88% Polyester, 12% Elastane Balaclava: Phasic AR  100% Polyester Highly air permeableallows air and moisture to move through the fabric to speed drying Breathable