Soft and comfortable zip neck in a loose and relaxed fit, cut in Polartec® Microfleece. 66°North logo ribbon on neck. Premium polyester yarns are used for their hydrophobic properties, to repel moisture and speed dry times. The lofted structures create thermal air pockets to retain warmth, and still allow optimal breathability. That’s why Polartec® synthetic fleece is still the most dependable, versatile fabric around.