The Ciele VLVInsulator is designed for running but built to perform throughout mixed conditions and the variety of cold weather cardio-driven sports. Details:Recycled C0 DWR polyester outer layer and Sorino | WS wool silk insulationRecycled polyester and carbon COOLmatic | EXP™ DIAMAfleece panelsCOOLmatic | EXP™ airBEAM™ for elevated ventilationZippered hand pockets and inner phone pocketReflective detailing for night run visibilityCiele Athletics™ million miles guaranteeMachine washableWeight 423 gramsDesigned for people who run