The best days up the mountain are the ones when you don't have to think about being wet or cold, which is why we built the Cascade Ins. Jacket with 8,000mm of waterproof protection paired with 8,000gm breathability. We included 100gm insulation for added warmth, while the taped critical seams and Zip Tech® jacket to pant interface act as a final barrier keeping snow out. The breathable lining system makes sure overheating won't be an issue while the hood is designed to be compatible to wear over a helmet. This jacket also features Grow-Tech, allowing you to add length to the sleeves by removing the basting stitch from the lining — a huge bonus when your kid sprouts up over night.