Long-sleeved shirt with a small stand-up collar and a short zipper for ventilation. The turtleneck is made from fine merino wool using a circular knitting process. It has excellent insulation properties and keeps you warm even when wet and in extremely cold temperatures. These thicker garments are designed as a mid-layer to optimize heat insulation between the close-fitting functional underwear and the outer layer, which is worn for protection against wind and moisture. They are particularly useful in lower temperatures or during less intense activities. It is a knitted terry fabric, with one side being smooth and the other consisting of terry loops. The airy terry loops combined with the crimped structure of the wool create a jersey knit.