Ibex Woolies Pro Tech Crew vs REI Co-op Merino Wool Base Layer Crew
Weight and specs compared for 2026 — and which one to choose.
Lightweight merino wool base layer with 125 GSM fabric, 85% merino/15% nylon blend, ultra-fine 18.5 micron wool for comfort.
Full details →Budget-friendly merino wool base layer for backpacking.
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Ibex Woolies Pro Tech Crew vs REI Co-op Merino Wool Base Layer Crew: which should you buy?
If saving weight is your priority, the Ibex Woolies Pro Tech Crew wins — at 133 g it is 57 g (30%) 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.