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Patagonia Capilene Cool Trail Shirt vs Smartwool Merino 150 Base Layer Long Sleeve

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

Patagonia Capilene Cool Trail Shirt is the lighter option — 10 g lighter than the Smartwool Merino 150 Base Layer Long Sleeve (7% less weight). If grams matter to you, that is the one to beat.
Spec Patagonia Capilene Cool Trail Shirt Smartwool Merino 150 Base Layer Long Sleeve
Weight 140 g · 0.140 kg · 0.31 lb 150 g · 0.150 kg · 0.33 lb
Brand Patagonia Smartwool
Category Clothing - Base Layer Clothing - Base Layer
Patagonia Capilene Cool Trail Shirt
140 g

Ultralight polyester base layer for warm weather hiking.

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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 Cool Trail Shirt vs Smartwool Merino 150 Base Layer Long Sleeve: which should you buy?

If saving weight is your priority, the Patagonia Capilene Cool Trail Shirt wins — at 140 g it is 10 g (7%) lighter than the Smartwool Merino 150 Base Layer Long Sleeve (150 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.

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