The Helly Hansen Legendary Insulated Pants have earned their excellent reputation on the slopes for unrestricted movement and reliable waterproofing! With HELLY TECH® Performance technology, you won't have to worry about getting wet even on the warmest sloppiest days. 2-way stretch fabric allows you to move freely. The PrimaLoft® insulation and thigh-vent zippers allow for perfect thermoregulation. They're toasty when zipped up or a nice cool breeze when the vents are open.