Heavy insulation that adds a layer of warmth to light shells and winter jackets alike. Stows in a pocket when the weather warms mid-ride.

The RS Winter Mid Layer simplifies four-season cycling by adding versatility to your wardrobe and eliminating the need for different dedicated jackets for the shoulder seasons and winter. Over a base layer and under a spring/fall shell, it upgrades light weather protection to a full winter jacket, trapping warmth while jettisoning internal moisture. On days when the temperatures drop, pull up the integrated face cover and hood; when the temperature or the road climb during your ride, the Thermobooster peels off to stow until clouds roll in or on long, chilling descents.