Waterproof & breathable GORE-TEX membrane. The removable insole is very practical. With cosily warm lining. Two Velcro straps for optimal fit and support. These boots are designed for children and feature a warm lining and two Velcro straps for a secure and adjustable fit. The Gore-Tex membrane ensures they are waterproof and breathable, keeping feet dry and comfortable in various weather conditions. The removable insole adds to their practicality.