The Black Diamond Men's First Light Hybrid Vest is a versatile, insulating and incredibly breathable midlayer vest that combines a range of field-proven materials. Made with essential core insulation for stop-start pursuits in cold conditions. This dynamic vest also features migration-resistant PrimaLoft® Silver Insulation Active with strategic panels of nylon merino-blend fabric for added breathability, as well as a lightweight Schoeller® stretch-woven shell fabric with NanoSphere® Technology that easily sheds oil, dirt and water.