Like Montane's revolutionary Prism Mitt the Prism Dry Line series feature PrimaLoft GOLD Insulation, a PERTEX outer, brushed microfleece lining but with the added benefit of FREEFLOW Mantle inner waterproof lining. Warm, lightweight, extremely packable and waterproof, these mitts are ideal for moving fast and light in cold, wet conditions Mens Prism Dry Line Mittens