W HH MERINO CREWWomens merino wool crew neck base layer top for thermal regulation and moisture management 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.