This is a black winter boot made of functional polyester with an adjustable closure at the shaft and a soft rubber sole that continues around the foot. The outer material of the boot is 59% recycled and made from recycled polyester. Both the sole and shaft are waterproof individually. The boot also features a removable and durable polyester sock on the inside, making it suitable for both colder and warmer periods. Additionally, this product has a water-repellent PFC-free treatment (does not contain PFOS, PFOA, or similar chemicals) with a water column pressure of 10,000 mm and a breathability of 8,000 g/m2/24 hours.