Mittens rarely need washing, so don’t go throwing them in your weekly laundry pile. That said, there are times when a filthy mitt needs some love. Start with a spot clean: Wipe down the exterior with mild soap and water then air dry.
If your mittens have separate liners, remove and wash them as needed. If the entire mitten needs a thorough machine wash, use a tech-specific wash like Granger’s Performance Wash on the delicate cycle. Lay flat to dry.
You can also condition leather, which is a great waterproof material but needs proper care. First, rub down the mitten with a damp cloth to remove any grit. Next, massage a leather wax like Sno-Seal into the surface. Allow to air dry at room temperature overnight. Use a soft cloth to remove any extra wax, and get ready to enjoy your supple, waterproof mittens.