The specialized 686 x tech insulator jacket is constructed from a woven fabric that39s been given a dwr coating making it water resistant specialized has incorporated 100g primaloft insulation to keep you consistently warm both under effort and when relaxed primaloft is ultralight breathable and has a high warmth to weight ratio which gives you a dependable insulation layer that will never leave you feeling clammy or cold the tech insulator jacket includes an adjustab