Whether you wear it alone on a crisp autumn ride or under a few layers for a mid-winter commute, you'll want the Gore Wear Base Layer Thermo Turtleneck next to your skin. Its synthetic fabric wicks away moisture and moves it away from you to minimize chills. Thermo-stretch fabric moves as you do and the extended hem ensures coverage as you pedal so you don't have to worry about coverage. The 1/4-zip design lets you choose your coverage level, and the baselayer has a semi-fitted cut so it slides easily under your warmer layers.