The Sabelt UI-500 Nomex Undershirt consists of Lenzing Fire Resistant fibre, which is made of a natural raw material, and keeps the body cool and dry. The use of modacrylic and elasthane, which make the garments highly stretchable, make this line the most convenient and innovative line of fire resistant underwear.

The composition of the new UI-500 line of undergarments makes the clothing light, resistant, and very comfortable. The two-way stretch, warp-knit seamless fabric has a high wear resistance and is very light.