Keep the cold and wind at an arm's length when you wear this. Only slightly more heavy than a long-sleeve shirt, the merino wool seater is combined the brand's custom coolmax fabric. The result is a shirt even more breathable and warm than standard merino wool. It's ribbed at the collar, cuffs, and hem, making this top a touch above your average layer able. Wear it year round, from chill summer nights by the campfire to layering up on frosty winter days.