Icebreaker collaborated with Goldwin to create this exceptionally soft 15.5-micron (μ) merino shirt that regulates body temperature in all weather conditions and resists odors.
The wool of this shirt is graded ultrafine and it has a noticeably luxurious hand. You can certainly tell this shirt is softer than a 16.5-micron or 17.5-micron merino shirt.
Here’s a guide to fineness grading for wool:
- Fine grade (18.6μ – 20μ)
- Superfine grade (15.6μ – 18.5μ)
- Ultrafine grade (15.5μ and below)
Link: Icebreaker
Outlier’s Ultrafine Merino shirt is my personal favorite. Sewn in the USA from 100% merino wool, this sweater is the perfect weight, has great colors, and is very durable. Yes, they are pricey, but I’ve put mine through its paces and it has held up admirably.