Cloud Nine is the Terramar product where form perfectly meets function. The midweight fabric is ultra-soft and features ClimaSense Thermoregulation Technology that automatically adjusts to your body temperature. When you are cool it traps air to maintain warmth. When aerobic activity rises and the surface temperature increases the fabric allows moisture vapor to escape to maintain comfort. Whether skiing, snowshoeing or mountaineering, this Cloud Nine bottom is functional performance at its best! 360Adeg stretch jersey Strategically placed mesh panels for increased ventilation and breathability Flat seam construction and stretch waistband finish INTELLISCENT(TM) Triple Action Stealth Technology Odor Absorbing & Odor Neutralizing Moisture management Soft brushed surface creates additional air trapping warmth Fast-drying, breathable and soft fabric No noise knit construction UPF rating 25+ 86% Micro Polyester 14% Spandex