A good build quality 'Made in the country' ensures lasting pleasure., Certification: (G., O., T. Underwear from Engel Naturtextilien - This wonderfully warm underwear is made from 70% finest merino virgin wool (kbT) and 30% silk. Only the finest undercoat of merino sheep is used for washing Underwear from Engel Naturtextilien - This wonderfully warm underwear is made from 70% finest merino virgin wool (kbT) and 30% silk. Engel - Lingerie & Underwear Store Short Sleeve Base Layer GOTS Certified Herren Unterhemd, Engel Natur, Wolle Seide GOTS Certified Thermal Wear The underwear is buttery soft, fashionable cut and is very popular to wear. Engel Wolle Seide Unterhemd Gr. 140 | Kaufen auf Ricardo Wool and silk underwear regulates heat and moisture and therefore the optimal wash for the cold season. Only the finest undercoat of merino sheep is used for washing.