A good range of Thermal Underwear products from Tervel are now in stock at Military1st.co.uk and for maximum warmth underneath, the Tervel Comfortline Shirts would provide the base layer for your requirements... "Tervel Comfortline long sleeve shirt is extremely lightweight & soft base layer top, providing maximum comfort & freedom of movement in every situation.

Made of Supplex, modern synthetic fiber, that combines the advantages, look and functionality of cotton with the strength and technological properties of polyamides, and regulates body temperature during any type of physical activity. It also features newly developed Push & Pull technology for optimum moisture transport. Thanks to unique combination of 3 fibers Push & Pull technology wicks moisture away from the skin surface and separates it out leaving a feel of warmth and dryness. Additionally the Quick-Dry function causes rapid drying of the product, the shirt guarantees to keep its original shape and appearance during long-term use and it always adapts to the body through the use of Lycra fiber.

Visit Military 1st at http://bit.ly/Tervel for details."