Beeswift Thermal Long Johns are perfect for outdoors or cold environments. This base layer provides the wearer an additional source of warmth, while still allowing the body to breath and enabling a full range of movement. A comfortable fit that is close to the body and virtually unnoticeable under everyday work clothing. Soft. polyester/viscose fibre offers good insulation against cold conditions. Lightweight material. Heat seal labelling for irritation-free fit.