I'm 5'10" and 165 pounds. The medium is true to size from the neck, arms, and waist. There is no waist cinch or external chest pocket. Cuffs are tight, no closures. Two large hand pockets, two-way zipper, and a side zip that allows for jersey pocket access. Unlike some garments this has Alpha covering the entire inside. Very warm (would not wear in 45F+ even with wicking lightweight base), expect to cut out at least one layer in freezing temps. Obviously not waterproof, it provides enough repellency like a good softshell. Easily doubles as a casual jacket without shouting "look at me, I ride bikes!" Try to find it on sale and you'll have an indispensable cold weather garment. A solid A+ effort by Specialized and Polartec.