Made of pure Merino wool, this Classic top is useful pretty much year round: from Fall to Spring you'll use it as your base layer for hiking, cycling, skiing and everyday wear, and during summers it's a luxurious pajama top for nights spent in a sleeping bag. - Relatively narrow slim fit style - Enhanced freedom of movement - Shoulder tops don't have seams, reducing risk of chafing - Flat lock seams - Naturally anti-odour, with less need for washing than technical alternatives Machine wash with wool detergent, follow instructions on wash tab, do not use bleach or fabric softener.