The Black Diamond Spark Mittens are hand-hugging heroes that sport a goat leather shell tougher than a seasoned ski bum, with BD.dry waterproofing to keep moisture at bay. Inside, they’re stocked with PrimaLoft Gold insulation and a fleece lining. With internal finger slots for dexterity and a low-profile cuff that says “you shall not pass!” to sneaky snow, the Spark Mittens are ready to drop in on the deepest and steepest lines your mountain has to offer.