Design Philosophy Endura\'s extensive expertise in designing road and off road riding gear comes together to create a waterproof jacket tailored to meet the varied demands of adventure and gravel riding. Versatile Protection A carefully considered feature list ensures no compromise performance in a wide variety of conditions without adding excessive bulk to maintain a small pack size. A slim fit suits short fast blasts and long steady, multi-day rides. ExoShell40™ Using an innovative 3 layer construction and weighing in at only 70gsm ExoShell40™ delivers a formidable combination of minimal pack size, immense breathability and high durability. The key to the ExoShell40’s impressive breathability rating of 40,000g/m²/24hr and high waterproof rating lies in the ultrafine, fluorine free membrane, protected by a superfine denier tricot laminate and impregnated with a proprietary compound enhancing moisture transfer.