We find the French brand Jet for this short-sleeved T-shirt in Thermojet, its composition is a mixture of rhovyl fiber associated with a warming acrylic.
This model is made to keep you warm because it is the most insulating of all, ideal for winter sports.
In addition it has a mesh Interlock which is formed of two thicknesses which is worth to him its name of mesh double face, thicker and heavier than jersey, it is extensible in width and its two sides are smooth.