Castelli Core Seamless Base Layer Sleeveless - White

The Castelli Core Seamless sleeveless base layer was created because Castelli has never been happy with the traditional nylon / Lycra® structure of most seamless underwear, because they tend to retain a lot of humidity. We engineered this Core Seamless with a mixture of polyester and polypropylene that moves the moisture away from your body with absolutely minimal moisture uptake.

The fabric is soft next to your skin and provides great temperature regulation in mild conditions. It’s not for hot temperatures but it does work as a first layer even into cooler temperatures, while the seamless construction keeps it extremely comfortable next to your skin.