Omni-Tech™ windproof, waterproof breathable fabric is critically seam sealed for weather protection; 100g Microtemp XF II synthetic fiber insulation keeps you warm Omni-Heat™ thermal reflective lining reflects and retains body warmth Outgrown grow system extends cuffs so they can wear it next season, too Gusset and articulated, reinforced knees aid mobility Zippered hand pockets; cargo pocket Adjustable tabs at waist secure the fit Silicone grippers at leg openings secure them over boots Reflective detail