Updated for more underfoot comfort and a lighter weight, the Men's Chilkat V 400 Waterproof Boots still boast our warmest package of toasty Heatseeker Eco insulation for comfort on cold winter adventures.Upper: Made with a combination of full-grain waterproof leather and suedeElevated rustproof metal hardwareWaterproof, seam-sealed construction400 g Heatseeker Eco insulation for exceptional warmthWebbing loop at heel for easy on/offHeel clip for snowshoe compatibilityD-ring at bottom of tongue for gaiter attachment