EXTREME WINTER PROTECTION: One of the warmest mitts in the Black Diamond line, designed for high-altitude climbs, deep winter expeditions, and long days in severe cold. Built to keep hands warm in the harshest conditions. TOUGH & DURABLE SHELL: Constructed with a woven nylon shell featuring 4-way stretch and goat leather palm with Kevlar stitching. Reinforced materials deliver maximum durability against ropes, rock, and equipment wear. WATERPROOF & BREATHABLE BARRIER: Equipped with a GORE-TEX waterproof insert plus breathable protection. Keeps snow, slush, and wet conditions out while allowing heat and moisture to escape. INSULATED REMOVABLE LINER: Includes a fully removable liner mitt with 170 g PrimaLoft Gold insulation and high-loft fleece. Provides superior warmth and quick-drying versatility, even if exposed to moisture. TECHNICAL FIT & FUNCTION: Gauntlet-style cuff with drawcord closure seals out snow, while wrist strap and removable leash provide security. Articulated design balances dexterity with maximum warmth for skiing, mountaineering, or winter trekking. The Black Diamond Mercury Mitt is a popular choice for year-round use and combines a BD.dry waterproof insert with an Empel DWR on the shell. The removable insulated liner, filled with Primaloft Gold Cross Core, dries quickly, and insulates even when wet. A four-way stretch fabric shell and a long gauntlet cuff keep spindrift and moisture outside, while the goat leather palm and additional reinforcement layer stands up to rocky terrain, repeated rope handling and the general wear and tear associated with dedicated mountain use.