Fox Racing Tecbase LS base layer T-shirts are lightweight, formfitting, long sleeve tees that'll keep the warmth in and against your body. Designed to be worn under your jersey, they feature a slim-fit construction of TruDri fabrics that move sweat away from the body to keep you dry and comfortable. The material is also antimicrobial to prevent odors. Tecbase LS base T-shirts are finished with the Fox Head logo on the front and Fox branding on the lower back.