Merino Long Johns - Flame Resistant Size:3XL Nature’s Secret underwear use 100%

Nature’s Secret underwear use 100% fine merino wool which ensures it is non-itch and incredibly soft against your skin whilst providing superior warmth

Nature's Secret singlet

extra leg length & dual-layered crouch protection you can be sure they will keep your bottom half warm when needed most

cycling or wearing under the helmet on a motorbike

Merino Long Johns - Flame Resistant Size:3XL Nature’s Secret underwear use 100%Brass Monkeys FR (Flame Resistant) long johns are made with our FR fabric, a blend of merino wool and FR treated materials. Meeting the HRC1 standard, they offer additional flame resistance and electrical arc protection. These thermal leggings are warm, breathable, durable, and highly visible. They are ideal for layering in the workplace or on the frontline.