The EVO Thermal Skin Top is constructed from breathable, quick-dry SuperFlex thermal fleece with a Water Repellent Finish offering excellent thermal insulation and moisture management. The UPF50 rating also means that your skin will be protected from both UVB and UVA rays. Designed with active panels, the flat locked seams offer superior comfort and performance. This is an extremely versatile product and can be worn as a base, mid or outer layer.