The original loose fitting base layer with 100% natural warmth. The technical performance of merino matched with uncompromised style, the Yotei Classic has the versatility of being work on and off the mountain. It can be worn on its own or over a base layer. Made using our 100% Merino, which is warm, breathable and odour resistant. Mons Royale Yotei Merino Long Sleeve Mens | Brick | X-Large | Christy Sports