The ultimate insulator engineered to keep you warm. Featuring featherlight PrimaLoft® gold insulation active encapsulated by a clean, technically simplistic design providing the ultimate warmth to weight ratio. Designed to fit seamlessly under any Sonic jacket, allowing freedom of movement and creating the perfect interface for optimal performance.
Ultra soft 20d nylon face fabric with DWR finish
Mapped PrimaLoft® Gold Insulation Active • 100g
15d ultra breathable nylon lining
7 inch side pockets
Seamless integrated layering design