KEEN children's winter boots with Velcro fastener KEEN Knotch Chukka children's winter boots (code 1026737) made of leather material. The shoes have a reinforced heel and a very comfortable inside of the shoe with a Velcro fastener. The toe is round and slightly reinforced. The shoe is treated with natural antibacterial Eco Anti-Odor technology, where the insoles of the shoes are filled with probiotic technology that naturally destroys the smell of sweat without heavy metals or dangerous chemicals. Material: leather, textile, rubber