BUFF Alsien Black Polar Multifunctional Neckwear. Engineered for unpredictable conditions, this multifunctional polar neckwear delivers exceptional warmth through PrimaLoft® Bio™ Fleece—a fully biodegradable insulation technology. Constructed from 97% recycled materials, it combines environmental responsibility with performance. The 4-way stretch fabric adapts to multiple configurations: wear it as a neck gaiter, beanie, balaclava, or face mask depending on conditions. The lofted fleece construction traps heat efficiently while maintaining breathability, making it an essential layer for serious cold-weather athletes and outdoor enthusiasts.