This layer can be worn over, under, and in-between to give you lightweight warmth and comfort. The Women's Smartloft 150 Vest uses a nylon shell with DWR to protect you from the elements and 88% recycled Merino insulation to keep out the cold. Features DWR Finish: DWR finish (Durable Water Repellent) helps repel water from fabric surface Wind Protection: Wind-resistant panels protect against the elements Regular Fit Insulation is lined in Merino for sweat and odor management Stretchy knit panels target Merino next to skin and polyester against the elements while allowing for ease of movement 2 zip hand pockets, internal zip chest pocket with cord routing 2-way front zipper and adjustable zip side panels for custom fit and ease of movement Knit in Vietnam: Shell - 100% Nylon; Panels - 46% Polyester, 38% Merino Wool, 16% Elastane Care: Machine Wash Cold Gentle Cycle. Do Not Bleach. Tumble Dry Low. Cool Iron As Needed. Do Not Dry Clean. Wash With Like Colors. Do Not Iron Decorations.