The Essential Insulated Gilet combines the advanced windproof Pertex Quantum ripstop fabric with strategically placed panels of Polartec Alpha Insulation, providing excellent breathability and a high level of warmth. Despite its insulating properties, the gilet remains compact enough to fit into your back pocket. The combination of materials enhances the gilet's insulating capabilities. The fit is designed to accommodate one or more layers underneath, and it features a taped rear pocket and silicone elastic at the hem.