Kilpi NIEL-M men's thermal underwear are made of quick-drying OPTI-DRY material, which is pleasant to the touch, extremely elastic, wicks moisture away from the skin well, thus maintaining thermal comfort. The waist with a high seat and woven hem does not press and adapts well to the figure. A seamless knit with flat seams and a body-hugging fit maximize comfort when moving and wearing. We recommend that you also get the KILPI NATHAN-M thermal shirt as a great set not only for skiing, but also for other outdoor and sports activities. Material composition: 53% polyamide, 41% polyester, 6% elastane