Expedition Merino 235 Long Johns

Devold's Expedition Merino 235 Long Johns are built for serious cold, making them a cornerstone of any winter layering system. The 235 g/m² merino wool, combined with a two-layer construction, sets them apart from most base layers on the market. This isn't your average lightweight merino; the inner layer is 100% merino for direct-to-skin comfort, while the outer layer, a blend of 90% merino and 10% polyamide, adds durability and structure. The result is a substantial piece of insulation that traps warmth effectively, even in damp conditions, without feeling overly bulky under outer pants. They maintain merino's natural odor resistance, which is a significant advantage on multi-day trips where laundry isn't an option.

From a field-use perspective, the fit is generally athletic but not constricting, allowing for a good range of motion, which is crucial for active pursuits. The flatlock seams are well-executed, preventing chafing during long periods of wear or under heavy exertion. While they are certainly warm, they also breathe reasonably well, mitigating the clammy feeling that can sometimes occur when moving between different activity levels in deep cold. Durability, often a concern with merino, is addressed by the polyamide in the outer layer, offering increased resistance to abrasion and snags compared to single-layer, pure merino alternatives. However, don't expect them to be indestructible; they still require care like any wool garment.

These long Johns are best suited for those who genuinely operate in cold or frigid environments, whether that's ice climbing, winter camping, or working outdoors in sub-freezing temperatures. They offer a significant thermal boost beyond what lighter base layers provide, essentially acting as a mid-weight layer that sits directly against the skin. Compared to synthetic equivalents, they excel in moisture management and odor control, though they will feel heavier and take longer to dry if fully saturated. For those prioritizing warmth, comfort, and natural performance in extreme conditions, the Expedition 235 is a reliable, high-performance choice.