Classic All-Season Merino Base Layer Bottom Men's

$70 ~~$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
Merino-lined wide elastic waistband
Flatlock seam construction for comfort
Fully Functional Fly
Odor resistance
Slim Fit
Machine washable and dryable

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

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

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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

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Customer Reviews (4.8 / 5 · 5 reviews)

Natalie ★★★★★ Oct 22, 2026

Finally, a base layer that actually stays comfortable against the skin all day—the 88% merino blend breathes perfectly whether I'm working up a sweat or just lounging. The 12% nylon definitely helps, as the fabric hasn't shown any signs of pilling or stretching out after several washes.

Steven ★★★★★ Oct 21, 2026

Wore these on a cold morning hike and the merino kept me perfectly comfortable without any itch. The 12% nylon blend makes them sturdy enough that I don't worry about snags on branches. Already planning to grab another pair for everyday wear.

Ava F. ★★★★★ Oct 20, 2026

The wool-nylon blend keeps its shape all day without that scratchy feeling I've gotten from other merino layers. I've worn it hiking in the 50s and lounging indoors, and it breathes just right in both.