Santi Flex 360 sleevles overall is made of Flex360 insulation fabric (legs), embossed Polar fleece 300 g/m2 (back) and Flex180 filled with 3D mesh spacers (front side). This mix of material guarantees that body warmth will be trapped and cold external elements will not be a threat at all.
PrimaLoft® Gold Insulation in the back and front sections is used for protection in extreme conditions. Microfibers trap body heat but retain top level of breathability. Flex 360 on the external side of the sleeve combined with Flex180 on inner side guarantees ultimate flexibility. There is no choice between warmth and comfort anymore. They simply go together.