Whether you’re 2,000m up, emerging from frigid waters, or on a windswept clifftop, the Argo Base Layer will keep you cool whilst you’re exerting energy, and warm when you’re not. Using our new Merino wool / Tencel® blend and comfortable no-rub shoulder seams, it is lightweight, soft and warm, with no synthetic fibres. Guaranteed non-mulesed Merino wool.