Easily fit the shoes of US 3.5-10.5 ( Europe Size: 35-43 ) * Thermoplastic elastomer with excellent elastic & high density manganese steel to ensure the maximum durability * Securely attached to your footwear & these slip-on spikes can dig into all types of terrain ¡ª ice, packed snow, wet rocks, concrete, and scree * Reduce the risk of injury from slips and falls when walk on ice, snow, mud and wet grass or other poor conditions. * Easy on/off to fit boots, sneakers, casual and dress shoes-- Wrap the front around your toe section, then stretch the back around your heel