Devold Spirit from Lenzing FR® and merino wool is dual layer underwear that reduces the risk of 2nd and 3rd degree burn injuries considerably. Good protection, excellent design and a lightweight fabric, makes this the most advanced flame retardant underwear at the market. Lenzing FR® reduces the risk of heat stress, and has very limited shrinkage caused by heat. The knitting structure in combination with merino wool, results in garments that absorbs and transports moisture from your body to the outer layer where it evaporates. The inner layer of Lenzing FR® gives a feeling of silk to your skin, perfect for sensitivity to wool. The outer layer from 100 % fine, merino wool insulates against cold and keeps you warm even when it is wet. Balaclava model 817 is EN13911 approved.