MERIWOOL
MERIWOOL Men's 400 Heavyweight Crew
At 400 g/m², this interlock-knit crew is the heavyweight option in the initial catalog. Its density is the reason to consider it, not a promise that one shirt replaces a winter system.
The merino edit
Heavyweight Merino Wool Tops
A heavier top earns its place when it fills a specific gap in your layers. Decide whether that gap is next to your skin or over another shirt.
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Minus33
Minus33 Men's Yukon Expedition Crew
Yukon is Minus33’s 400 g/m² interlock crew, a dense all-wool layer for shoppers deliberately choosing heavyweight construction.
How to choose
Weight labels are not standardized across every brand. Read the manufacturer’s fabric information and distinguish an actual GSM value from a series name. A top called thermal or expedition does not automatically belong in the same weight group as another brand’s similarly named garment.
Consider the clothing around it. If it is your base layer, inspect seams and fit beneath the next layer. If it will go over a tee, check that the shoulders and sleeves allow that extra room. A zipper and collar can be useful to adjust, but they should work with the jacket neckline.
Heavier fabric is not a substitute for planning the entire clothing system. Your activity, wind exposure and other garments affect what works. Our winter layering guide explains the different roles without attaching a guaranteed temperature range to one shirt. Buy the weight that serves the missing role rather than choosing the largest number.
| Intended role | Useful evidence |
|---|---|
| Next-to-skin top | Close comfortable cut and seam placement |
| Over another shirt | Layering room through shoulders and sleeves |
| Comparison across brands | Published GSM and construction, not naming alone |
Is 250 GSM always heavyweight?
No. Brands use different category labels. Treat the documented number and fabric construction as comparison details, then decide whether the garment suits the layer you need.
Read before you choose
Field notes
Merino fabric weight: GSM, garment grams and warmth labels
Compare merino fabric GSM without confusing it with shirt weight or a brand heat index. Learn what 150, 200, 250 and 320 can—and cannot—tell you.
Read the guide →Field notes
Layering a merino top in winter
Build a winter outfit around the role of each layer. Learn when a heavier merino top helps and when insulation, wind protection or easier venting matters more.
Read the guide →Field notes
Choosing a merino ski base-layer top
Compare merino ski tops by collar, cuff, torso length and compatibility with your jacket. Choose for active runs, lift rides and warmer lodge breaks.
Read the guide →Model comparison
MERIWOOL 250 vs 400: midweight or heavyweight?
Compare MERIWOOL 250 and 400 long-sleeve crews by fabric density and layering role. Choose the weight that fits your existing winter outfit and activity.
Read the guide →