Classic All-Season Merino Base Layer Long Sleeve Men's F25

$71 ~~$100~~ In stock

Category: Men's Baselayers

Awesome lightweight Merino wool base layer from Smartwool. Great next-to-skin comfort in warm or cold conditions.

Details

88% Merino Wool, 12% Nylon fabric for the perfect balance of comfort and durability in a lightweight wool baselayer
Core Spun Merino fibers wrapped around a nylon core that adds durability while maintaining soft Merino next-to-skin comfort
Crew neck style
Offset shoulder and side seams
Flatlock seam construction for comfort
Soft next-to-skin comfort
Odor resistance
Machine washable and dryable

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 (4.4 / 5 · 5 reviews)

Zoe ★★★★★ Oct 21, 2026

Wore this on a chilly morning hike and forgot I even had it on—the 88% merino blend keeps you warm without that scratchy feel. It’s genuinely lightweight, so it layers under a jacket without any bulk, and the nylon gives it just enough stretch for movement.

Madison ★★★★★ Oct 19, 2026

I was worried about overheating during my morning runs, but this layer breathes perfectly even when the temperature climbs. The 12% nylon blend definitely adds durability without sacrificing that soft wool feel.

Kevin N. ★★★★★ Oct 18, 2026

The merino wool blend is so soft against the skin, and I love that it breathes well whether I'm hiking in the cold or just lounging around. It's lightweight enough to layer under a jacket without any bulk, and the 12% nylon definitely adds some durability.