Featuring exceptional ventilation and the latest breathable fabric technology, the Mens GR20 Storm Jacket from Berghaus is the most breathable 3L Gore-Tex® jacket in the world. With waterproofing robust enough to protect you from even stormy conditions, this lightweight jacket is the ideal defence against the elements, keeping you warm, dry and comfortable in the harshest environments. Features Storm level waterproof guaranteed Hyper-breathable face fabric Gore-Tex® Active shell membrane Patented Body Mapping storm vents Extremely lightweight – 277g (Size M) Packs down small for convenience Glossary Gore-Tex® Active Shell garments are durably waterproof, windproof and extremely breathable – the most breathable fabric in the GORE-TEX® product family. These fabrics are the ideal solution for highly aerobic activities, even in bad weather, and are lightweight, soft and comfortable. Body Mapping storm vents are strategically placed vents in the fabric that allow for heat regulation and breathability, without compromising the storm-proof protection of the shell.