... 2,quick dry,thermal,anti-bacterial,odour free 100% polypropylene underwear/baselayer. Material:100% micro polypropyleneFabric can be 120g to heavier weight ... weight.Featurers:1,light weight for underwear/base layer.2,Polypropylene dries three times quicker than polyester when get sweat, then ... quickly so you don't stay cold and wet.3,Polypropylene also retains more heat than any other fabric so you ...