Alpinestars Ride Tech Winter base layers do more than you expect. The honeycomb open mesh structure of the material yields maximum heat and moisture exchange for optimal cold-weather comfort, while the compression fit reduces muscle fatigue to allow you ride harder for longer. Dry fit keeps the body comfortable. It ensures that the thermoshirt has a moisture-regulating and moisture-repellent effect, so that the body stays warm when it's cold. The thermoshirt insulates the heat from the body. The Ride Tech is made of Lycra spandex stretch so that the thermoshirt fits perfectly around the body.