Rain And Stain Repellent On The Outside, Reflective Warmth On The Inside And Stretch Fit Make These Ideal For Winter Hikes. Gusseted Leg Openings With Zippers, Removable Belt And Ankle Cinches Make These Flexible Whatever The Conditions. The thermal reflective lining on the inside trap your body heat inside and close to your skin in order to keep you warm. oMNI-SHIELD Quick-Drying Technology Repels Water And Stains By Preventing Liquids From Absorbing Into The Yarns And Saturating Or Staining Your Apparel.