The MTN Spike model was designed for speed hiking in autumn and winter on ice, snow and mixed terrain. It can be adapted to all shoe types and allows quick movement over ice and snow covers. The robust construction with eighteen stainless steel spikes provides good traction. Comes with a protective storage bag. Size overview: EU: S=36-39, M=39-42, L=42-44, XL=44-47 UK: S=3.5-6, M=6-8, L=8-9.5, XL=9.5-12