The Rooster Polypro Top is constructed from a combination of Polypropylene (94%) and Elastane (6%).FeaturesBreathable Polypropylene material wicks moisture away from the bodyBrushed fleece inner providing excellent thermal qualitiesDries very quickly after use and washing due to the hydrophobic (water repellent) nature of polypropyleneWear beneath a Hot Top as an insulating layer during winter for incredible warmthIdeal for a range of outdoor activities in the colder months including skiing, road cycling, mountain biking and kayakingSizing