Seamless construction eliminates chafing for enhanced comfort during movement
Polyester and polypropylene yarn blend provides warmth and softness for cool conditions
Moisture-wicking fabric keeps you dry and comfortable during activity
Wide neck opening allows easy fit under short collared jerseys
Exceptional stretch ensures a flexible, secure fit
Summarized by Shop
The Castelli Core Seamless Long Sleeve Base Layer is outstandingly comfortable and shockingly warm for its lightweight. The combination of polyester and polypropylene yarns is warm and feels super soft against skin. The fibrous construction circulates air to evaporate sweat which helps you maintain a healthy performance body temperature.