What Our Gearhead(R) Experts Are Saying: "The Alpha 4. 0 is my 'one-and-done' resort shell for cold months-stretchy Helly Tech Professional keeps me dry, PrimaLoft Black Eco is legit warm without bulk, and the Aerogel Life Pocket actually helps my phone survive frigid lift rides. Fit runs a bit trim in the arms-size up if you layer heavy."From storm laps to sun breaks, the Alpha 4. 0 is tuned for the rhythm of the chairlift. Helly Tech Professional 2-layer fabric seals out sleet and blower while moving with you thanks to built-in stretch. Low-bulk PrimaLoft Black Eco insulation takes the bite out of single-digits, and when temps climb, H2Flow pit zips dump heat fast. A removable, helmet-compatible hood, adjustable powder skirt, and fully sealed seams keep snow where it belongs. Thoughtful touches-like the Aerogel Life Pocket to keep batteries alive and an integrated RECCO reflector-round out a jacket that disappears into your day so you can focus on the fall line.