Thank you for viewing. The size is for children (up to elementary school age). It prevented snow from entering the shoes and getting wet and cold when wearing snow boots for playing in the snow. It covers up to the calf. The black rubber part in the third photo goes on the sole of the shoe. It's also warm with padding. The calf area has elastic. It's in good condition. The elastic is not stretched out. The gray color in the fourth photo reflects light from cars, etc., so it's also safe. It can also be used for walking to school in the rain. I bought it for playing in the snow, but I hardly used it, so it's in good condition.