Castelli Core Seamless Base Layer SS - White

What Does the Castelli Core Seamless Base Layer SS in White Do for Your Ride? The Castelli Core Seamless Base Layer SS in White is the warm-weather short-sleeve foundation layer that works under any summer or spring jersey without showing through as a dark underlayer. Seamless construction removes the shoulder and underarm seams that generate friction over long hours on the bike in an aggressive position, and the snug body-mapped fit stays flat against the skin without creating visible bulk at the collar or waistline. White is the practical choice when riding in white or light-colored jerseys where a black or colored base layer shows through uncomfortably. The moisture-wicking fabric pulls sweat away from the skin and allows the jersey above to function as intended by keeping the base layer from saturating against your skin. The flat waistband stays tucked into bibs cleanly without rolling or bunching, and the slim cut avoids adding a stacked layer of fabric under your jersey on hot days. Machine washable in sizes XS through XL, made in Italy, the Core Seamless SS in White is the base layer that stays hidden so your kit can do its job.