RaceX Classic Wind Half Zip W is the perfect hybrid baselayer for cross activity. Highly recommended for those windy and colder days, all year around. Constructed with a front body outer layer that are wind resistant and has a moisture-wicking function to prevent chill down in higher speed. Main fabric has a high stretch function for optimal freedom of movement and a quick dry performance for great comfort. It is made with Repreve(R)-polyester recycled fiber (ocean bound plastic bottles). The bottles are collected within 50K of coastlines in countries or areas that lack formal waste or recycling systems. Longer zipper at neck opening with a top and bottom closure for quick and easy ventilation. Stretch cuffs at bottom hem sleeves for great comfort.