A List Of Ultrafine and Superfine Merino Base Layers

These are the finest merino base layers I’ve tested:

Merino Base Layer Tops

• Merino Short Sleeve Shirt by Loow — two-ply compact spun Italian utlrafine merino — 15.5 microns — 160 g/m² — $116
• Merino Short Sleeve T-Shirt by Outlier — 100% top-capped MacKenzie 17.5 micron merino — 195 g/m² — $120
• Merino Long Sleeve Shirt by Lasting — 100% merino from Australia — 16.5 microns — 160 g/m² — $70
• Veilance Frame Shirt Long Sleeve Shirt by Arc’teryx — 87% superfine merino, 13% nylon — 16.5 micron — 185 g/m² — $200
• Merino Long Sleeve Shirt by Minus33 — 100% merino — 17.5 micron — 170 g/m² — $64
• Merino Long Sleeve Shirt by Proof — 87% merino, 13% nylon — 17.5 micron — $98
• Merino Long Sleeve Shirt by Outlier — 100% merino — 17.5 micron — 195 g/m² — $140

Merino Base Layer Bottoms

• Katmai Men’s Expedition Weight Bottom by Minus33 — 400 g/m² — 100% 18.5 micron merino wool — $120
• Merino Wool Leggings by Hocosa — made in Switzerland — 70% KbT-certified organic merino wool, 30% silk — $100
• “Pro-Knit Warm Up Sweatpant” by Woolly — 100% 18.5 micron merino — 250 g/m² — $90
• Shifter Sweatpants by Icebreaker — 98% Merino Wool, 2% Lycra — 18.5 micron — 260 g/m² (mid-weight) — $150

Also:

• Yak Wool Leggings by Kora — 100% yak wool — 230 g/m² — $145