A fully waterproof insert and PrimaLoft insulation make the Black Diamond Mercury Mitt a popular choice for year-round use. Four-way stretch Pertex 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 BDry insert adds moisture protection even when you use the liner by itself.Features 100% waterproof BDry insert stays with removable liner Lightweight, abrasion-resistant, Pertex Shield shell with four-way stretch Removable liner features 340 g PrimaLoft Gold Insulation and high-loft fleece lining Goat leather palm, plus palm patch with Kevlar stitching Removable liner features split-finger design Weight Per Pair: 260 g (9.2 oz) Temperature Range: -29/-12 C (-20/10F)