Our Women's Merino Crew Base Layer is a high-performance base layer designed to provide warmth and comfort during winter activities. It features a crew neck and is made with the softest, 100% natural ZQ-certified merino wool. ZQ-certified merino wool is a third party audited wool standard that requires growers to adhere to the best farm management practices. Merino wool is a soft and natural choice for thermal regulation and moisture management.