Paul Costelloe's merino wool half-zip long-sleeve pullover delivers sophisticated layering for the discerning gentleman. Crafted from premium merino fiber, this piece regulates temperature naturally while resisting odor and wrinkles—ideal for both professional settings and casual wear. The half-zip design provides adjustable ventilation and easy styling versatility. Merino's inherent breathability keeps you comfortable throughout the day, whether worn as a standalone piece or layered beneath outerwear. A refined essential that combines performance with timeless aesthetic appeal.