The Swix RaceX Classic Half Zip for women is trusted by generations of athletes for a reason. Lightweight, fast-drying and incredibly breathable, this long-sleeve baselayer offers a slim, feminine fit with just the right amount of stretch. The half-zip adds adjustable ventilation, so you stay in control whether you’re pushing hard or taking it slow. Perfect as a standalone piece for mild conditions or layered in colder weather. Made with 70% REPREVE® recycled polyester from plastic bottles, this is Swix super underwear at its finest – built for performance, worn all year.