The Black Diamond Men's BoundaryLine Mapped Jacket combines rugged waterproofing with intelligent, innovative insulation so you can ski comfortably whether it's a spring day at the resort or a powder day in the backcountry. Its fully sealed, BD. Dry membrane gives the four-way stretch shell phenomenal waterproof ratings to ensure solid protection during the snowiest days of the season. Black Diamond made the body-mapped insulation out of Lavalan wool for better moisture management and thermoregulation. There are ventilation zippers under each sleeve for amplified airflow, and the hood is compatible with ski helmets. The stretchy powder skirt stows away to transition from snowy to sunny conditions with ease.