Finally, there are Windstopper type base layers made from Pertex, a fabric as thin and lightweight as cigarette paper. These are loose fitting and worn as your last layer before putting on the leather suit. Offering complete wind resistance and to a degree are showerproof. Great for wearing under vented leathers on a cold and inclement day, these fold into a pouch the size of a mobile phone and are very transportable. BKS offer both the EDZ and the PROSKIN version of these garments as tops and legs.