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Patagonia Capilene Midweight Crew vs Smartwool Merino 150 Base Layer Long Sleeve

Weight and specs compared for 2026 — and which one to choose.

Smartwool Merino 150 Base Layer Long Sleeve is the lighter option — 35 g lighter than the Patagonia Capilene Midweight Crew (19% less weight). If grams matter to you, that is the one to beat.
Spec Patagonia Capilene Midweight Crew Smartwool Merino 150 Base Layer Long Sleeve
Weight 185 g · 0.185 kg · 0.41 lb 150 g · 0.150 kg · 0.33 lb
Brand Patagonia Smartwool
Category Clothing - Base Layer Clothing - Base Layer
Patagonia Capilene Midweight Crew
185 g

Recycled polyester base layer. Fast drying and durable.

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Smartwool Merino 150 Base Layer Long Sleeve
150 g

Lightweight merino-blend long-sleeve base layer (men's) with natural odor resistance for all-season layering.

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Patagonia Capilene Midweight Crew vs Smartwool Merino 150 Base Layer Long Sleeve: which should you buy?

If saving weight is your priority, the Smartwool Merino 150 Base Layer Long Sleeve wins — at 150 g it is 35 g (19%) lighter than the Patagonia Capilene Midweight Crew (185 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest clothing - base layer page, or browse the full gear weight database.

More clothing - base layer comparisons