New to the Smartwool lineup, the Smartwool Intraknit Thermal Merino Neck Gaiter is designed to enhance freedom of movement, optimal warmth and breathability, all while staying super lightweight. The Merino Sport yarn extracts the quality of merino wool and combines it with the ultimate durability and dry time of polyester to deliver a neck gaiter that stays fresh for the whole trip. When it comes to quality, Smartwool never lets you down.