Retezat Boxer Mns are men's thermal undershorts, a real find for multi-day hikes and trips. They contain merino wool (15%), which is known for its natural warming properties. Thanks to the proportion of wool and polyester (15/85), this piece is comfortable to use when traveling for several days and long hikes, because it is more resistant to odor formation and dries faster. Anatomical fit and flat seams provide freedom of movement and do not rub. This is a great choice for hiking and traveling.