The North Face Base Camp ThermoBall Mule in black combines outdoor heritage with modern comfort. Part of the Base Camp Collection, this slip-on features a 100% recycled PET ripstop upper with a non-PFC durable water-repellent finish to keep moisture at bay. ThermoBall™ insulation made from 100% recycled polyester provides lightweight warmth—even in wet conditions—making it perfect for après, camp life, or everyday wear. A non-marking Vibram® XS Trek outsole delivers reliable traction and durability across varied terrain, so you can move confidently indoors or outdoors.