Stone Glacier | Altimeter MittsWaterproof, insulated mitt system worn in extremely cold and wet conditions. Removable liners add versatility to integrate with other SG Gloves and also allow quick drying times of the shells and liners if palms get sweaty. If youre riding your snowmobile into a dark timbered hole to track a cat or waiting on a sopping wet Brooks Range ridge for a bedded ram to stretch its legs, warm hands are not negotiable. With waterproof 3 layer HydraShield shells