A fully waterproof shell and Prim aloft insulation make the Black Diamond Mercury Mitt a popular choice for year-round use. Four-way stretch Pretext Shield fabric and a large gauntlet keep moisture at bay and the goat leather palm with Kevlar stitching increases durability for seasons of hard use. The removable split-finger liner features a high-loft fleece lining for increased warmth and comfort and a Dry insert adds moisture protection even when you use the liner by itself.