When you’re hunkered down in frigid temps or hiking through mounting snow drifts, you need the heavyweight warmth of the 330 Series. The merino wool-blend fabric offers more warmth with less bulk and naturally resists odor when you’re on extended hunts. We also engineered it to be stronger than traditional merino. And since wetness is the biggest threat to warmth in cold conditions, we gave it a synthetic interior that rapidly moves moisture away from your skin and through your system.

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Built for frigid late-season sits, the heavyweight Core Merino 330 Half-Zip features our warmest-weight merino wool to keep you warm in the coldest conditions. Merino wool has an exceptional warmth-to-weight ratio to keep you warmer with less bulk and it regulates temperature through stop-and-go pursuits. Merino wool also resists odor to help minimize your scent, and our ArmorSpun merino wool outlasts traditional merino wool. And to prevent sweat from leaving you wet and cold, we added a synthetic interior that rapidly moves moisture away from your skin and through your system to keep you dry and warm.