The Shadow from Gul is for extreme conditions, part of their tough four-layer waterproof fabric performance range. The GCX4 material is a breathable, waterproof and hard-wearing four-layer fabric that has been engineered to withstand demanding use over time. It is waterproof to 20,000mm and has a breathability of 10,000g/m/24h, with all the seams fully taped for extreme waterproofing that lasts over time.