An insulating men's base layer for work, exercise or relaxation, our SOCKSHOP Heat Holders 0.45 TOG Sleeveless Vest is a lightweight but thermally efficient piece of clothing for everyday wear. It's made from a smooth, fine-woven cotton blend, brushed inside for a plush surface that is comfortingly soft against the skin, and that gives the vest its thermal performance. The fleecy brushed fibres catch and then hold warm air in them, keeping the warmth in, around your body. This men's thermal vest has a proven TOG rating of 0.45, so you can be certain it will keep you warm! It has a ribbed construction for added stretch and a better fit to the body's contours, a longer length in the body so that it helps insulation, can be tucked better and keep out drafts more easily. The Heat Holders Sleeveless Vest has a seamless body too, for more comfort and a smoother look. SOCKSHOP Heat Holders Men's 1 Pack 0.45 TOG Sleeveless Vest in Black Size: Small