Active hunting. It can be grueling but necessary. Imagine you’re chasing sheep at high elevation in cool temperatures and you have to move — fast. The Surt Jacket retains warmth when and where you need it and releases excess heat and moisture during periods of high activity. Filled with PrimaLoft® Gold Cross Core™ insulation, the Surt is the warmest jacket in the Badlands Active Hunter Series and designed for the cold-weather active hunter.