5 mm neoprene provides comfort and flexibility along with excellent waterproofing shock absorption and heat retention properties adjusts to the shape of your feet to resist blisters and chafing Breathable Airmesh lining wicks away humidity and perspiration and allows air to travel throughout the boot while keeping water out comfort rated from subfreezing to 65 F18 C Womens last is specially designed to support the female foot Highgrade extended rubber exterior provides extra toughness and makes for a 100 waterproof work boot rugged outsole offers durability and traction on slick surfaces Rear pull tab for easy onoff