namuk's well-known, beloved Merino shirt, now in a short-sleeved version: Because Merino wool is super comfortable in the summer, too, cooling or warming the body as needed, and thus perfectly suited for hikes and other mountain adventures. Completely mulesing- and polyester-free! Features: Antimicrobial properties, Fast-drying, Moisture management, Odorless, Stretch fabric. Material: Main material: 100% Merino wool 16.5 mic / 160gsm. Country of origin: China.