HEAT HOLDERS Womens/Ladies Extra Warm Thermal Underwear Long Sleeve Vest (0.39 Tog) Modal, Nylon, Elastane Premium quality long sleeve thermal vest. Thermal construction holds more warm air to the skin, maintaining warmth. Soft brushed inside. Technical construction for better fit. Sizes (UK dress size/bust size) - S/M: 6-14/29-41inch, L/XL: 16-22/41-49inch.