Snowbee Base Layer Thermal Underwear is highly elastic and fits closely to the body profile, to allow maximum wicking performance. Once perspiration has been transferred away from the skin to the mid layer, the breathable outer garment can get to work to transfer it through the breathable membrane to the outside, keeping you dry and warm in the harshest conditions. Trials have shown this new thermal underwear to be one of the lightest, warmest and most comfortable we have ever tried. Guaranteed to keep you warm and dry in the worst weather the elements can throw at you.Features of the thermal underwear include, two-layer knitted fabric - polyamide inside, pure cotton outside. Permeable polyamide inner layer wicks moisture quickly away from the skin, to the outer layer. Cotton outer layer soaks up perspiration to allow rapid evaporation.Colour: Grey Marl. Material: 55% Cotton. 45% polyamide (nylon)!!<>!!Sizes: !!<>!!!!<>!!Small - Chest 36/38" - Waist 32"/48"Medium - Chest 38/40" - Waist 34/36"Large - Chest 40/42" - Waist 36/ 38"X large - Chest 42/44" - Waist 38/40"Materials are made from highly elastic material, so sizes are not critical, use above as a guide.