Whether you need thermal protection outdoors or some extra warmth and comfort at home, this Men's Lightweight Thermal Long Sleeve Vest in Indigo Marl will make your life warmer. With a tog rating of 0.44, our women's thermal base layers will keep you warm all winter.  Heat Holders lightweight super soft micro-fleece thermal underwear offers ideal stretch properties and comfort seams to allow full freedom of movement and a comfortable, non-chafing fit that’s perfect as a single layer or worn under your regular clothing. Moisture and odour control technology help to keep you warm, dry and fresh all day long, while anti-static treatment minimises the build-up of static and reduces its effects. Our love of warmth and comfort is backed up by proven science and over 50 years of technical expertise. At the core of every Heat Holders base layer is our lightweight super-soft thermal microfleece, combining performance insulation, comfort and dryness to maximise thermal performance and keep you warmer for longer. Please check the size guide above before purchase Fibre Composition: 62% Polyester, 34% Viscose, 4% Elastane Machine Washable at 30°C. Heat Holders can be tumble dried but are happiest when line dried. Mens Lightweight Thermal Long Sleeve Vest - Indigo Marl