Black Diamond's popular Mercury Mittens feature a fully waterproof shell and a removable split finger liner for increased dexterity. The liner is waterproof and insulated with PrimaLoft Gold, making these mittens versatile enough for year round use.. . This product will be shipped directly from Black Diamond and will leave their warehouse in 2 3 business days. Eligible for UPS ground shipping only. Temperature range: 2010AdegF 29 12AdegC. Lightweight, abrasion resistant, Pertex Shield waterproof, breathable shell fabric with 4 way stretch. 100% waterproof BDry insert stays with removable liner to keep hands dry. Removable liner with split finger design: Insulated with a combination of 340 g PrimaLoft Gold insulation and high loft fleece. PrimaLoft Gold synthetic insulation provides heat trapping warmth that insulates even in the wettest weather maintains 96% of warmth when wet breathable, packable, and incredibly soft. Goat leather palm, plus palm patch with Kevlar stitching.