Outdoor Research Alpine Onset Merino 150 Base Layer Bottoms – Men's

Built for cold-morning hunts, shoulder-season hikes, and mild Southern winters, the Alpine Onset Merino 150 is our go-to base layer bottom for anyone who wants warmth without bulk. The merino-polyester blend means soft, low-stink comfort that dries faster, while the lightweight 150 weight keeps layering simple.

• Lightweight 150-weight knit adds warmth without bulk, so it layers easily under pants or shells
• Merino wool blended with polyester for softness, durability, and moisture management
• Merino stays comfortable across a wide temperature range and resists odor on multi-day trips
• Fits close to the skin as a base layer, which keeps insulation efficient and chafing low
• Good for cool-weather hiking, hunting, and early-season trail runs, and it packs down small