Mercury

Black Diamond

The Black Diamond Mercury Mitt is widely treated across the outdoor industry as the gold standard for high-output, deep-winter warmth. Designed primarily for severe cold, stormy resort laps, and freezing backcountry ascents, it prioritizes thermal efficiency above all else. For skiers who routinely battle numb fingers or spend full days riding in bitter wind chill, this mitten delivers dependable heat retention without requiring internal electronic heating elements. Construction centers on a durable exterior combining rugged nylon with a supple goat leather palm, paired with a removable split-finger liner. The shell features BD.dry waterproof protection, while the liner packs heavyweight PrimaLoft Gold synthetic insulation across the back of the hand and palm. This two-piece system allows users to dry the liners quickly overnight in a ski cabin or swap them out if they become saturated from sweat during hard exertion. The trigger-finger interior liner design gives just enough internal separation to aid grip on ski poles while keeping the fingers grouped for maximum thermal pooling. Inevitably, choosing a high-loft mitten means accepting a major drop in fine motor skill. Adjusting small boot buckles, operating zippered pockets, or handling car keys requires taking the mitten off. However, for sheer warmth per dollar and proven longevity in harsh alpine conditions, few alternatives match its consistency. **Highlights** - High-loft PrimaLoft Gold insulation distributed for heavy cold protection - Removable insulated liner with an internal trigger-finger design - Tough goat-leather palm reinforced with durable stitching - Long gauntlet cuff with a one-handed pull closure to keep deep powder out - Waterproof BD.dry insert within the shell fabric **Watch-outs** - Significant loss of dexterity compared to standard five-finger gloves - Can easily cause sweaty hands in mild spring conditions - Shell leather requires occasional conditioning to maintain water resistance

Guide

Black Diamond

The Black Diamond Guide is a heavy-duty, five-finger alpine glove built for mountaineers, ski patrollers, and riders who encounter demanding terrain in harsh weather. Where most five-finger designs sacrifice warmth to maintain articulated grip, the Guide uses a dense layering strategy to rival the heat retention of lighter mittens. It is engineered for people who subject their gear to sharp ski edges, abrasive rope work, and prolonged freezing conditions. The exterior combines a durable four-way stretch woven nylon shell with a thick goat leather palm and reinforced knuckle padding for impact and abrasion resistance. Underneath the shell, Black Diamond utilizes a fully waterproof and breathable Gore-Tex insert. Inside, a removable liner pairs thick PrimaLoft insulation on the back of the hand with boiled wool against the palm. This hybrid fill layout maintains warmth even if moisture builds up from internal sweat during strenuous ascents. The primary trade-off is overall mass and a mandatory break-in window. The Guide is exceptionally bulky for a five-finger glove, feeling stiff and cumbersome right out of the box until the thick leather softens up. It is also overkill for mild resort days, but for sub-zero alpine conditions where you still need individual finger control, it remains an industry benchmark. **Highlights** - Premium Gore-Tex waterproof, breathable insert - Removable liner combining thick PrimaLoft synthetic insulation with boiled wool - Rugged goat leather palm and knuckle patches built for heavy abrasion - Four-way stretch nylon shell on the gauntlet for mobility - Generous gauntlet cuff that fits smoothly over technical jacket sleeves **Watch-outs** - Stiff out of the box and requires a break-in period - High bulk and weight compared to standard resort gloves - Overheats quickly in moderate or spring temperatures

Mercury

Best for: Skiers with chronically cold hands and backcountry tourers demanding maximum furnace-like warmth at a lighter weight.

Guide

Best for: Ski patrollers, mountain professionals, and hard-charging resort skiers who need bombproof durability and five-finger dexterity in frigid weather.