When the temperature cools down, heat up your workout with CEP's Cold Weather Base Shirt. This shirt keeps you comfortable by using a blend of heat-retaining materials and soft fabrics. Vents through the front and sides of the shirt keep air moving to help skin fresh as you push through your workout. Smart Clima technology uses high-quality materials designed to be worn in both hot and cold conditions Ventilation holes in the front combined with lightweight materials throughout the shirt provide optimal breathability Seamless design delivers a comfortable, stay-put fit Long and short sleeve options give you the flexibility to adapt to your workout