Black Diamond designed the Women's Mercury Mitts for all-winter performance. The PFC-free BD.dry waterproof outer protects against the wet. A removable liner mitt filled with Prima Loft Gold synthetic insulation gives reliable warmth. Long gauntlet cuffs help stop blown snow & spindrift from getting up your jacket sleeves on wintry days. The outer shell fabric comprises durable recycled nylon with four-way stretch for freedom of movement. The liner mitt has a soft fleece lining for increased comfort & warmth while remaining dextrous. Black Diamond used supple goatskin leather on the palm, with a reinforced patch to withstand seasons of wear & ropework in the mountains.