Men's 300 MerinoFine™ Polar Long Sleeve Half Zip

Men's 300 MerinoFine™ Polar Long Sleeve Half Zip - View 3

Men's 300 MerinoFine™ Polar Long Sleeve Half Zip - View 4

Men's 300 MerinoFine™ Polar Long Sleeve Half Zip - View 5

Men's 300 MerinoFine™ Polar Long Sleeve Half Zip - View 6

$161.2 ~~$260~~ In stock

A heavyweight merino wool base layer top designed for the coldest of days, the 300 MerinoFine™ Polar Long Sleeve Half Zip features premium 15.5-micron icebreaker merino wool that offers refined softness while efficiently managing moisture, drying quickly, providing natural odour resistance, and delivering breathable comfort.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy

If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy

Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Michael ★★★★★ Oct 20, 2026

The half-zip is a game-changer for temperature control on brutal cold days, and the 15.5-micron wool is noticeably softer against my skin than other thermals I've owned. Perfect for layering under a shell during winter hikes.

Henry C. ★★★★★ Oct 19, 2026

Had this on during a freezing morning hike and the half zip made it easy to vent heat without stopping. The merino wool is soft and doesn't itch at all. Perfect for layering under a shell.

Sofia ★★★★★ Oct 18, 2026

The 15.5-micron merino wool is incredibly soft against the skin for a heavyweight layer, and the half-zip makes it easy to vent heat during a hike. I wore it on a sub-freezing morning and stayed perfectly warm without any itchiness. It's become my go-to for the coldest days.