The Grampy 3000 Jacket is a blast from the past, with tech from the future. Its micro-ripstop fabric is lightweight and durable, and thanks its fully-seam-sealed Glacier construction you can dip your way in and out of fresh snow without getting soaked. Airblaster uses Zonal Synthetic insulation, giving the arms a little less fill than the torso. Not only will your hardworking limbs thank you when they don't overheat, the lowered bulk gives them all the room they need to whale.