A good base layer should enhance the riding experience, not distract from it. Thanks to seamless design and moisture-wicking properties, the Chrono Sleeveless Base Layer is the ultimate layer. The lightweight engineered knit Chrono Base Layer does just that. It features nylon thread to ensure a soft feel, while polyester content pulls moisture away from your skin. It has enough stretch to allow freedom of movement and fit your body comfortably. It's also extremely light and tucks easily under a bib short without any bunching. - Wikpro material - 60% nylon - 30% polypropylene - Seamless construction