100% merino wool underwear, soft ,comfortable,warm,light,porous 100% merino wool underwear with outstanding feature:1. Pure merino wool keep you warm2. Fine spun wool feeling soft and comfortable3. Light,Quick-dry4. Breathale,Odour resistant5. Using 4 needles 6 threads machine sewing, Smooth flatlock stitching seams not chafe your skin men's merino wool thermal base layer