The Rab Firewall Alpine Jacket builds a 20D Pertex Shield 3-layer shell that holds real waterproofing at just 10. 1oz, so it earns a permanent spot in the pack instead of getting left behind when the forecast looks uncertain. Fully articulated sleeves and extended, shaped cuffs move with the body through reaches and pulls, so the jacket doesn't bind up during technical movement on an exposed ridge. What Our Gearhead(R) Experts Are Saying:"I've cinched this hood down one-handed while the other hand stayed on the rock, and the single-handed cord lock adjustment never once made me stop to use both hands."