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Patagonia Capilene Cool Trail Shirt vs REI Co-op Merino Wool Base Layer Crew

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

Patagonia Capilene Cool Trail Shirt is the lighter option — 50 g lighter than the REI Co-op Merino Wool Base Layer Crew (26% less weight). If grams matter to you, that is the one to beat.
Spec Patagonia Capilene Cool Trail Shirt REI Co-op Merino Wool Base Layer Crew
Weight 140 g · 0.140 kg · 0.31 lb 190 g · 0.190 kg · 0.42 lb
Brand Patagonia REI Co-op
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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REI Co-op Merino Wool Base Layer Crew
190 g

Budget-friendly merino wool base layer for backpacking.

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Patagonia Capilene Cool Trail Shirt vs REI Co-op Merino Wool Base Layer Crew: which should you buy?

If saving weight is your priority, the Patagonia Capilene Cool Trail Shirt wins — at 140 g it is 50 g (26%) lighter than the REI Co-op Merino Wool Base Layer Crew (190 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