Developed for fisherfolk like yourself, the Simms Fleece Midlayer 1/2-Zip Top is warm, comfortable, and stretchy enough to move freely in. When it's a foggy morning by the creek, you'll appreciate the way the grid-fleece interior traps your body heat, and thanks to a touch of spandex you'll have no trouble casting for fish till it's warm enough to shed a layer. The smooth outer face makes for a low-friction feel beneath your waders or shell, and it features a zippered neck you can open when you need just a touch of ventilation.