This incredible "heavy mid-weight" 4 layer vest is one of the most versatile pieces in the COS arsenal. Wear this as a layering piece and being sleeveless, this approach obviously assists in keeping bulk in the arms to a minimum. Using both Berber- Wool and Fleece-Wool shells in a paneled approach for the ultimate in a warmth / bulk combination. The 40 gram Quiet-Loft insulation compliments the WindSeal-TC3 wind barrier and 3X-Tricot lining perfectly. Full length YKK zipper front, lined side zipped hand pockets, upper side entry chest pocket on wearer's left, safety harness in the back, and lined collar.FeaturesBerber-Wool main shell40 Grams of Quiet-Loft insulation with Windseal-TC3 for added warmth3X-Tricot lining throughoutSafety harness vent in the backZippered chest pocket