#1 on this list
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
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#2 on this list
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
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Specs side by side
| Spec | Mercury | Guide |
|---|---|---|
| MSRP | Around $150 | — |
| Shell | Stretch nylon shell with goat leather palm | — |
| Insulation | PrimaLoft Gold (170g back of hand, 133g palm) | 200g PrimaLoft and boiled wool |
| Waterproofing | BD.dry waterproof insert | Gore-Tex waterproof breathable insert |
| Liner Design | Removable with internal split-finger trigger | Fully removable hybrid liner |
| Cuff Style | Extended gauntlet with one-hand cord lock | Extended gauntlet with drawcord cinch |
| Shell Material | — | Goat leather and 4-way stretch woven nylon |
| Approximate Price | — | $200 |
What our reviewers liked and didn't
Mercury
- Exceptional thermal retention for sub-zero temperatures and storm days
- Removable insulated liner speeds up drying times on multi-day trips
- Durable goat leather palm holds up to ski pole friction and rope abrasion
- Internal split-finger design provides better grip stability than classic mitts
- Severe loss of fine finger dexterity compared to five-finger gloves
- Runs excessively warm during moderate temperatures or high-output skinning
- Leather palm requires routine conditioning to maintain water repellency
Guide
- Exceptional warmth approaching the heat retention of many mittens
- Removable liner allows rapid drying between intense ski sessions
- Durable goat leather palm withstands sharp ski edges and rope work
- Proven Gore-Tex membrane delivers reliable waterproof protection
- Noticeable stiffness out of the box requires a lengthy break-in period
- Substantial bulk and weight restrict fine motor dexterity
- Overheats easily during high-output activity in moderate temperatures
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