These are snow boots for children. They have inner boa lining. The Velcro straps allow for adjustment to fit the size of the foot! They have spikes, making them less slippery^^ Spikes are rare! I've only worn them a couple of times for a short time at a ski resort, but there is some rust on the spikes, so please refrain from purchasing if you are concerned about this. m(_ _)m Rayu 60 750