The Devold Expedition Merino Silk Longs for men provide exceptional warmth and comfort for cold weather. With a weight of 235 g/m² and fibers ranging from 20.5 to 18.7 microns, these long-sleeve base layers are soft and breathable. The inside is crafted from 100% merino wool, while the outside features a durable blend of 90% merino wool and 10% silk, ensuring a smooth and resilient finish. Ideal for layering in extreme conditions.  Materials Inside material: 100% merino wool Outside material: 90% merino wool, 10% silk