This is the Tilos 6mm Thermoflare Hi-Tract Semi-Dry Boots Scuba Diving Booties Features: Premium high traction rubber soles provide unparalleled grip and traction even in the slipperiest conditions. The Thermoflare lining offers an extra layer of heat to keep your feet warm and comfortable all day long. Double smooth-skin seals on the zipper flap greatly reduce water movement. The Thermoflare liner combines two different types of fabrics to provide optimal warmth and comfort. The dark fabric is designed to absorb water while the light fabric repels water, creating a soft and cozy insulation that feels like fleece on the skin. These fabrics create a thermal barrier that keeps you warm and dry in cold and wet conditions. The Thermoflare liner dries quickly, making it easy to maintain and reuse. Get ready to take on any wet and slippery surface with our unbeatable Hi-Tract Boot! Featuring premium high traction rubber soles, our boots offer unparalleled grip and traction in even the slipperiest conditions. And with Thermoflare lining providing an extra layer of heat and double smooth-skin seals on the zipper flap to greatly reduce water movement, you can rest assured that your feet will stay warm and comfortable all day long. The Thermoflare liner is a revolutionary product that combines two different types of fabrics to provide optimal warmth and comfort for the wearer. The dark fabric is designed to absorb water while the light fabric is designed to repel water. This creates a soft and cozy insulation that feels like fleece on the skin. Together, these fabrics create a thermal barrier that keeps the wearer warm and dry in cold and wet conditions. The Thermoflare liner also has the advantage of drying very quickly, making it easy to maintain and reuse."