100%merino wool underwear , soft , comfortable, warm, light,porous 100% merino wool underwear for boy with outstanding feature:1. Pure merino wool keep you warm 2. 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 boy's merino wool base layer