Making fresh tracks? This zip-up jacket will keep you comfortable with down-like insulation, a thermal-reflective lining that holds in heat, and a durable shell. Crafted from lightweight yet rugged 100% polyester fabric, this jacket features our signature Omni-Heat reflective thermal system and synthetic fill for incredible warmth. Plus, it’s fully featured for comfort with a drawcord adjustable hem, soft elastic cuffs, and cozy zippered hand pockets. Columbia offers this jacket in multiple colors and sizes. Extended sizing available. Regular Fit. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the sleeves, start at the center back of the neck and measure across the shoulder and down to the sleeve. If you come up with a partial number, round up to the next even number. For the chest, measure at the fullest part of the chest, under the armpits, and over the shoulder blades, keeping the tape measure firm and level.