REI Co-op Merino Wool Base Layer Crew vs Smartwool Intraknit Merino Top

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

REI Co-op Merino Wool Base Layer Crew is the lighter option — 10 g lighter than the Smartwool Intraknit Merino Top (5% less weight). If grams matter to you, that is the one to beat.

Spec	REI Co-op Merino Wool Base Layer Crew	Smartwool Intraknit Merino Top
Weight	190 g · 0.190 kg · 0.42 lb	200 g · 0.200 kg · 0.44 lb
Brand	REI Co-op	Smartwool
Category	Clothing - Base Layer	Clothing - Base Layer

REI Co-op Merino Wool Base Layer Crew

190 g

Budget-friendly merino wool base layer for backpacking.

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Smartwool Intraknit Merino Top

200 g

Zoned merino base layer with stretch panels.

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REI Co-op Merino Wool Base Layer Crew vs Smartwool Intraknit Merino Top: which should you buy?

If saving weight is your priority, the REI Co-op Merino Wool Base Layer Crew wins — at 190 g it is 10 g (5%) lighter than the Smartwool Intraknit Merino Top (200 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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