7 to 11 mm

This design allows the hiking crampon to go on and off with ease

Replaceable Nylon webbing under boot strap

Built in guides keep tie down straps in place so extra carrying case is not needed to attach to backpack

" data-original-title="ThermaCapture™">ThermaCapture™ technology traps radiant heat while Triangular Core Matrix™

Kahtoola K10 Crampon Belay Rappel & Ascension Devices 7 to 11 mmQUICK FIT BINDING Kahtoolas unique Quick Fit binding on the K10 Hiking Crampon makes it easier than ever to use serious traction when you need it. This design allows the hiking crampon to go on and off with ease, completely opening for receiving a shoe, and securely closing with two buckles. Patented Leafspring flex bar Flexes naturally with your footwear, for natural stride and ability to wear any type of footwear. Most crampons are not made to flex