The Black Diamond Boundary Line Jacket features significant world-first innovation and technology for your ski days beyond the resort. This jacket represents the culmination of BD’s commitment to unmatched performance and sustainability. By strategically mapping Lavalan insulation wool only where it is needed for maximum thermoregulation and moisture management, the BoundaryLine Jacket delivers the promise of performance and protection for high-output ski days. Lavalan wool insulation outperforms synthetics for insulative value due to its natural micro-structure. Wool is hygroscopic and can transfer up to 30% of its weight in water, allowing moisture vapor to move off the wearer through the insulation layer. Used with a BD.SOLUTIONWOOL base layer, moisture is efficiently captured and moved out, creating a truly active microclimate. When in a high output activity, the moisture vapor transfer process of sweating creates a natural cooling effect, resulting in an overall reduction of your body temperature.