The warmest KLIM balaclava is redesigned with comfort and functionality improvements across the board. Fleece-backed GORE-TEX Infinium with Windstopper panels cover the face, neck and front chest area for protection in the coldest conditions. The shoulders, back and sides of the head are 4-way stretch wind-resistant material for added protection and comfort. Redesigned seam placement and stretch panels also increase comfort. Windproof + Wind Resistant + Fleece Backer For Warmth And Wind Protection Neoprene Nose Piece/Breath Deflector Gore-Tex Infinium With Windstopper W/ Fleece On Face, Neck, Upper Chest Wind Resistant 4-Way Stretch Shoulders, Back, Sides Of Head 4-Way Stretch Lycra Back Of Head For Different Head Sizes Stretch Comfort Binding Around Face Silicone Grip Pad Keeps Neck Tucked Into Gear Low Profile Flat-Lock Stitching Low Profile Eye Port Construction Ultra-Wide Skirt Stays Tucked In For Wind Protection