A problem that predates modern skincare by thousands of years
The challenges extreme cold imposes on exposed skin are not new. Indigenous peoples of the Canadian Arctic — the Inuit — have understood and actively managed these conditions for thousands of years. Long before dermatology articulated the concept of a skin barrier, Inuit communities had developed a practical understanding of how skin behaves in sustained sub-zero exposure, and how to protect it.
That history is worth acknowledging — not because it informs modern formulation, which is built on clinical science, but because it establishes something important: the need for cold climate skin protection is real, ancient, and serious. It was never a seasonal marketing category. It was a survival requirement.
The conditions
The Canadian Arctic is extreme by any measure. Winter temperatures routinely fall below −30°C. Absolute outdoor humidity approaches zero. Wind chill compounds exposure further. For communities that depended on hunting and travel — spending hours or days outdoors in those conditions — protecting exposed skin was a daily, life-and-death matter.
The biology is unchanged. Cold air strips the hydrolipidic film. Ceramide-producing enzymes slow. Transepidermal water loss accelerates. Unprotected skin breaks down rapidly. What has changed is the tools available to address it.
Seal oil — the original cold-climate occlusive
The primary tool Inuit communities developed was animal fat — most commonly seal oil, rendered from the blubber of ringed and bearded seals. Applied to exposed facial skin, seal oil acted as a highly effective occlusive: a physical barrier that slowed moisture loss and provided insulation against wind and cold.
Historical accounts confirm this practice across Arctic communities. Inuit leader Joseph Idlout documented seal oil being used by ancestors specifically to wash and protect the face — sometimes blended with medicinal plants such as Labrador tea.
The mechanism is consistent with modern occlusive science. A lipid-rich film reduces transepidermal water loss by creating a physical barrier between the stratum corneum and dry, cold air. The specific lipids differ — seal oil is rich in omega fatty acids, not the ceramides and cholesterol of the human lipid matrix — but the functional principle is identical to modern cold-stable formulations.
Beyond topical: the parka as protection system
Inuit cold climate protection extended beyond topical application. Traditional Inuit clothing — refined over thousands of years — functioned as a complete environmental protection system. Sealskin offered wind resistance and water repellency. Caribou hide, with its hollow hair shafts that trap air, provided exceptional insulation.
The parka — an Inuit invention now used in cold climates globally — was designed with a hood that created a protected microclimate around the face. The design logic of reducing direct environmental exposure to vulnerable skin remains the foundation of cold-weather protection more than a thousand years later.
What this history teaches us
The knowledge Inuit peoples developed about cold climate skin protection was empirical, accumulated over generations of direct experience in some of the most extreme winter conditions on earth. It was not theoretical — it was tested daily, where failure had real consequences.
The conclusion those communities reached — that exposed skin requires active protection in sub-zero environments — has been quietly forgotten by an industry built primarily for temperate climates. The result is a category that was never built. Until now.
Boreal Shield™ does not claim lineage from or inspiration by Indigenous practices. Its formulas are built on clinical skin barrier science. But the underlying insight — that extreme cold demands a different approach entirely — is one Inuit peoples understood long before it became a category.
A note on terminology. The term "Eskimo" is considered outdated and offensive by most Indigenous peoples in Canada and is not used in this article. The correct terminology is Inuit — referring to the Indigenous peoples of Arctic Canada, Greenland, Alaska, and Siberia. Inuit Tapiriit Kanatami is the national representative organization for Inuit in Canada.