The Black Diamond Mercury Mitt is a popular choice for year round use and combines a BD.dry™ waterproof insert with an Empel DWR on the shell. The removable insulated liner, filled with Primaloft Gold Cross Core, dries quickly and insulates even when wet. A four-way stretch fabric shell and long cuff cuff keep spray and moisture out, while the goat leather palm and extra reinforcement layer stand up to rocky terrain, repeated handling of rope and general wear and tear associated with mountain use.