The Crewneck Lite Woolpower is a breathable long-sleeved base layer (very thin).
It is made of 80% merino wool from Patagonia and 20% polyamide.
It will be ideal as a first layer for your outdoor activities in all seasons.
You can order the Lite-Tee Woolpower underwear by clicking on the link below:
Crewneck Lite Woolpower