The windjammer is far and away the warmest in my four-way test, because it’s a two layer beanie. The outer is chunky knit merino and the inner is a thin fleece of Gore Windstopper fabric. The design is full on tea cosy – it’s a hat I can pull right down to the bottom of my (big!) ears – so that also helps seal the heat in, but the chunky knit and two layers mean it’s less well suited for helmet wearers. For me, this is a hat for when I’m at rest at a cold camp or on a chilly belay in the dead of winter. Your mileage may vary, but I run hot and prefer something more breathable when active. When the temperature dips past zero at camp, however, this is really luxurious. Weight 125g.
VERDICT: A windproof and very warm beanie.
BEST FOR: Walking, climbing. Those who feel the cold.