It is very simple: keep the core warm and go longer without stopping to adjust layers. The Retro-X Vest is made of ultrawarm retro-pi le laminated to a P.E.F. windproof scrim. The breathability and unconfined mobility of a vest complement the fabric perfectly, making for highly versatile insulation or an outer layer. Two handwarmer pockets are perfect for stashing small essentials. Made in the USA. FABRIC: Polyester 1/4\\" pile (75% PCR, 25% virgin) and Capilene-treated brushed mesh composite with P.E.F. barrier. Trim: Supplex nylon on collar and pocket.