469 merino wool thermal underwear products are offered for sale by suppliers on Alibaba.com, of which mens long johns accounts for 41%, womens long johns accounts for 22%, and mens other underwear accounts for 1%.
A wide variety of merino wool thermal underwear options are available to you, such as thermal, quick dry and breathable.You can also choose from wool, polyester and spandex merino wool thermal underwear,as well as from winter, autumn, and spring merino wool thermal underwear, and whether merino wool thermal underwear is thin, standard, or thick.