COMFORT AND FLEXIBILITY 4 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 EASY ON-OFF Mid-height shaft rolls down to ankle for more breathability and movement rear pull loop for easy on/off BREATHABLE LINING 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 °F/18 °C