Smartwool Size Chart How warm? Very warm. How comfortable? Very comfortable. The Men's Smartloft 120 Jacket uses 50% recycled wool insulation for lightweight, packable warmth and breathability even when wet. It also features a DWR-coated nylon shell for protection and a wool lining for sweat and odor management. It fits perfectly into any winter adventure. Features: - SmartLoft 120 medium weight, 50% recycled insulation works for a variety of activities and cold-weather conditions. Helps provide thermoregulation and warmth even when wet. - DWR finish (Durable Water Repellent) helps repel water from fabric surface - 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 - Zip chest pocket with cord routing and zip hand pockets - Shell - 100% Nylon; Panels - 48% Merino Wool, 44% Polyester, 8% Elastane; Fill - 88% Wool, 12% Polyester - Garment Weight: 448 g = 15.8 oz - Last Chance: Discontinued Style - Only available to ship within the USA