This crew-neck long-sleeved Omni-Wool performance base layer is the perfect blend of synthetic and natural merino wool. Established in Northwest Arkansas and the beautiful foothills of the Ozark Mountains, Omni-Wool represents the very best in merino wool products. Each Omni-Wool product is designed, tested, re-designed, and re-tested for extreme comfort, durability, excellent fit, breathability, and outdoor functionality. Plus, it's moisture-wicking to keep you dry, warm and comfortable.