A soft, microfleece layer is a must for any winter wardrobe-that's why the Columbia Men's Fast Trek Fleece Jacket exists. Columbia's soft, winter-ready staple is the ultimate warmth provider and everyday style piece. Perfect for Spring, Fall, or Winter. You're bound to be warm and worry-free in this fleece jacket crafted of our super-soft 100% polyester microfleece. It's the perfect layering piece and first line of defense to combat the cold. When fit across a wide range of layering is a factor, a regular fit is necessary; it allows for comfortable movement that you need. An added bonus is the warm collar that's flexible enough to wear it up or down, depending on your desired level of toastiness. Columbia offers our fleece jacket in a wide range of colors and sizes. 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 your 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.