ATLANTA — Duofold, maker of performance base layer products, is outfitting Yellowstone National Park’s outdoor employees for harsh winter conditions. The brand, which made its first product donation in 2005 to Yellowstone, shipped its Varitherm performance base layer tops and bottoms to the park’s headquarters in Wyoming in early November.

During the winter, Yellowstone employs more than 100 rangers, researchers and maintenance workers who work primarily in outdoor conditions overseeing and maintaining its roads, trails, structures and research projects.

Duofold, which is part of Hanesbrands, Inc., donated two types of base layer apparel for the park’s varying weather conditions: its Varitherm Expedition Weight base layer for extreme cold conditions and Varitherm Mid Weight base layer for more moderate conditions.

Ken Meyer, safety and health manager for Yellowstone National Park, said, “With this donation of base layer by Duofold, the risks of cold-related injuries such as hypothermia and frostbite are significantly reduced throughout the winter season.”