Not quite a shirt. Not quite a jacket. Enter the quilted shacket. A highly technical term here but stay with us. It's got an RDS-certified down filling for extra warmth, and the Tencel/Cotton shell has been peached for softness. Then on the inside, there's a double-brushed (read: soft) flannel lining. Thicker than our Signature Corbet fabric, this quilted fabric also has RDS-certified down-filling for a whole new level of warmth. Oh yeah, and we made it wind-proof because winter chills are the real culprit here. It's got a soft lining to keep you comfortable all day. Yup, we thought of everything. Alex, who starts every day with yoga and a pitaya bowl (you can Google it...we had to), is 6'1 and wears a Medium.